Study Guide

The Blood of Olympus

The Blood of Olympus Summary

Picking up after the events of House of Hades, our heroes are divided into two groups.

The first group is made up of Jason, Piper, and Leo (along with Percy, Annabeth, Frank, and Hazel). They're on the Argo II and they need to make it to the Acropolis stat. That's where Gaea, the Earth Mother, is supposed to awaken, and they need to stop it. (Of course, as goes with prophecies, trying to stop it is totally going to make it happen.)

Our other group is made up of Nico and Reyna who, along with Coach Hedge, are trying to get the Athena Parthenos statue back to Camp Half-Blood as a symbol of truce between Greeks and Romans…and hopefully stop Octavian from launching an onslaught against the camp.
With Nico's handy dandy shadow-travel ability, they're able to zip between time zones with the statue in tow. They travel through Pompeii, Portugal, a cruise ship in the Atlantic, Puerto Rico, and South Carolina, all exotic locales in their own rights. Along the way, they fight hordes of undead and hordes of werewolves and are pursued by a psychopath named Orion.

In Puerto Rico, Reyna's home, Reyna reluctantly reunites with her sister, Hylla, who wants to use her as bait for Orion. Bad idea. Orion wipes out most of the Hunters of Artemis before Reyna can escape. (Don't worry, sis is fine.) Orion catches up with Reyna near Camp Half-Blood, and Reyna summons her inner strength to defeat him.

As Nico sabotages Octavian's efforts to attack Camp-Half Blood, Reyna delivers the statue just in time…in time for Gaea to awaken, that is. Wait, how did that happen? Let's go back to team one.

Jason, Annabeth, and Piper learn that the strait of Corinth is chock full of death, and they have to go around the entire Peloponnese in order to reach Athens. They're advised to seek out Nike, the goddess of victory, along the way. She mentions yet another prophecy: one of them…will…die. Le gasp! But she advises them to seek out the physician's cure, which can bring someone back to life.

They retrieve the ingredients on their journey. Along the way, Jason is impaled, Percy is poisoned, Annabeth gets really scared, and everyone does battle with a statue demanding to see their health insurance. With the cure in hand, they reach the Parthenon where, yep, they end up feeding into the prophecy. Percy and Annabeth are injured, and their blood awakens Gaea.

Way to go, guys.

Leo flies in on a giant mechanical dragon, hauls Gaea's dirty butt into the sky, and blows her up. He manages to self-administer the cure, which brings him back to life, and he flies to the island of Calypso, the girl he loves.

And—say it with us—everyone lives happily ever after.

  • Chapter I

    Jason

    • Jason, Piper, and Annabeth are infiltrating a banquet of evil disguised as an old man (Jason) and two serving maidens.
    • It's "the biggest gathering of evil spirits [Jason] ever sensed" (1.26).
    • Remember all the suitors from The Odyssey? Well, they're dead, but their ghosts "live" on, and they're plotting something.
    • Jason worries, however, that his mother will be among the ghosts.
  • Chapter II

    Jason

    • Jason, Piper, and Annabeth arrive at the "out-of-control zombie frat party" (2.1)—Odysseus' palace, not college.
    • Disguised as an old man, Jason sidles up to one of the banquet tables.
    • A ghoul named Antinous confuses Jason with Iros, an old beggar, and Jason rolls with it to get information from the ghouls.
    • He learns that all these not-so-super ghouls and ghosts believe that once Gaea is raised and destroys the gods, she will divide up the mortal world among them. They all want to be in Gaea's good graces.
    • One of the ghouls has really loose lips, and he lets slip that the good guys' ship will sink if they try to travel through the Straits of Corinth. The only safe way to the Acropolis, where Gaea will awaken, will be to take the long way around the entire Peloponnese.
    • Having the intel he needs, Jason makes his getaway. But one of the ghosts, a dead Roman praetor demigod named Michael Varus, stops him.
    • He sees through Jason's disguise, and he summons a ghost to stop Jason: Jason's own mother.
  • Chapter III

    Jason

    • Piper and Annabeth rush to Jason's side to convince him that his mother's ghost isn't real.
    • As Jason stands up to the ghost, Piper uses her charmspeak to get the rest of the ghosts to leave them alone, now that their disguises have been exposed.
    • Jason tells the ghost, "I'm no child of yours" (3.63), and he makes a sign to ward off evil.
    • The ghost disappears.
  • Chapter IV

    Jason

    • The chapter's first line tells us all we need to know: "The fight was going great—until [Jason] got stabbed" (4.1).
    • Like Sephiroth and Aerith (Jason is Aerith), Michael Varus impales Jason through the chest with his sword.
    • Piper decapitates Michael Varus, and she and Annabeth tend to Jason's wound.
    • Problem: the sword was made of imperial gold, which basically makes it poisonous to demigods. Jason's wound is smoking.
    • Piper and Annabeth do what they can to bandage him and heal him; then they need to get him back to their ship, the Argo II.
    • Jason suggests they summon Juno…and poof, she appears.
    • She can't heal Jason, but she suggests they find the goddess Nike on their journey around the Peloponnese.
  • Chapter V

    Reyna

    • Reyna, Nico, and Coach Gleeson Hedge appear over Italy with the Athena Parthenos statue in tow.
    • They're falling through the sky toward the gaping mouth of Mount Vesuvius, so they have to shadow-travel (teleport) again immediately.
    • They do, and they end up crash landing in Pompeii.
    • Not a good place to be. A volcanic eruption that kills everyone leaves a lot of unhappy spirits behind.
    • Nico, a son of Hades, is able to keep them away while he's awake, but a boy needs his beauty rest.
    • And *snore* he's out. Shadow-travel is draining.
    • Coach Hedge agrees to keep watch so Reyna can sleep, too, and off she goes to dreamland.
  • Chapter VI

    Reyna

    • Asleep, Reyna has a vision: a hunter is pursuing Reyna and shoots her in the gut with an arrow. That's worse than a dream about falling.
    • Then the vision changes: Reyna sees that Octavian has set up an outpost and is planning an assault on Camp Half-Blood.
    • When Reyna wakes up, Hedge tells her they've got company. "Ghosts? Monsters?" Reyna asks (6.76).
    • "Worse. Tourists" (6.77).
  • Chapter VII

    Reyna

    • The tourists are unable to see the Athena Parthenon because it's cloaked in magic Mist.
    • When Nico wakes up, Reyna tells them about her visions.
    • As darkness falls, the crew gets ready to shadow-travel again, but all of a sudden, Coach Hedge starts speaking with a woman's voice.
    • No, he's not practicing for a drag show. He's possessed by someone…or something.
    • And—BOOM—human figures spring from the ground and attack.
  • Chapter VIII

    Reyna

    • Nico uses the scepter of Diocletian to summon some zombies to fight the rock monsters.
    • The scepter isn't happy to summon Romans to fight other Romans, and it asplodes!
    • As Nico readies to shadow-travel, Reyna battles rock monsters.
    • They escape just in time.
    • Whew.
  • Chapter IX

    Leo

    • Leo works on ship maintenance and misses Calypso, the girl he loves.
    • Piper, Annabeth, and Jason have made it back to the Argo II, and they plan their next step: finding Nike. (The goddess, not a shoe sale.)
    • Since she's the goddess of competition, they want to send a group of demigods down who are naturally competitive.
    • They agree to send two Greeks and two Romans: Percy and Leo and Frank and Hazel.
  • Chapter X

    Leo

    • The landing party searches Olympia (not the shoe store) for Nike (not the shoe), but all they find is a shattered statue in a museum.
    • At the Temple of Zeus, Leo remembers that the shattered statue of Nike once stood there.
    • Leo makes a joke about summoning "Adidas, the goddess of off-brand shoes" (10.76) and Nike, the goddess, is not happy.
    • Womp womp.
    • She appears, shouting "YOU WILL DIE NOW!" (10.75)
  • Chapter XI

    Leo

    • The goddess Nike is feeling a little schizophrenic. She splits into two images: Nike and her Roman counterpart, Victoria.
    • They try to convince her to come with them—that Gaea is the real enemy—but she won't listen.
    • She wants Leo, Percy, Frank, and Hazel to fight to the death to win her honor, but they say they'll fight her instead.
    • Nike summons four metal killing machines, the Nikai, and says they have five minutes to prepare and come to the stadium.
    • The crew makes a plan, and Leo provides everyone with gadgets and tromps to the stadium.
  • Chapter XII

    Leo

    • Bob Costas is out sick (pink eye), so we're not going to give you a full play-by-play of the battle.
    • Quick recap: Percy and pals win.
    • They trap Nike in a magic net, and she blabs about a "physician's cure" (12.114) giving them a clue on where to go next.
    • They need the poison of Pylos, the chained god's heartbeat in Sparta, and the curse of Delos.
    • Because she won't shut up, Frank puts a sock in it (her mouth) and Leo duct tapes it in.
    • Off they go!
    • First stop: Poison of Pylos.
  • Chapter XIII

    Nico

    • Coach Hedge grumbles "This isn't good" (13.1), which is Heroes of Olympus for "I have a bad feeling about this."
    • But Nico is still mostly unconscious and having a vision of his own: that he's back at Camp Half-Blood.
    • He learns that the camp is doing everything it can to defend itself from Octavian's upcoming assault.
    • They're nervous that the Athena Parthenos will not arrive in time.
    • Coach Hedge interrupts the dream vision when he wakes up Nico: "We've got problems" (13.56).
  • Chapter XIV

    Nico

    • The last shadow jump landed them in Portugal with the Athena Parthenos atop a temple. Oops.
    • To make things worse, a flaming ghost is beckoning Nico.
    • He follows the ghost, who leads him to a temple made of human skulls where, of course, Nico's dad Hades is waiting.
    • Hades informs Nico that the hunter pursuing them is Orion, and they cannot defeat him…only outrun him.
    • He also cryptically (can Hades talk any other way?) says, "Some deaths should not be prevented" (14.77).
    • Nico rushes back to Reyna and Hedge.
  • Chapter XV

    Nico

    • The crew eats as Nico fills them in on everything Hades told him.
    • Then, before you know it, wolves start howling and surround them.
    • One marches up to them and turns into a man right in front of them. (Alcide, is that you?)
  • Chapter XVI

    Nico

    • The man is Lycaon, the first werewolf.
    • Nico summons a wall of bones to guard them from the wolves as the wolves attack.
    • In order to shadow-travel, Nico needs a shadow. But he has a plan.
    • He taunts Lycaon, who transforms into a wolf and lunges at Nico.
    • Nico stabs the wolf and he dissolves into a shadow.
    • Suddenly, a voice booms out, "STOP THEM!" (16.73), and Nico hears a large bow being drawn.
    • It's probably Orion, but before we can find out, Nico uses the shadow to take Reyna, Coach, and the statue away.
  • Chapter XVII

    Piper

    • After retrieving the poison of Pylos (that was easy), they head to Sparta for the mysterious chained god.
    • Frank believes it's a statue of Ares, his dad.
    • Piper has a vision of touching the statue and flames swirling around her. Sounds fun.
    • They should reach Sparta by morning.
  • Chapter XVIII

    Piper

    • Jason is still sick from the sword wound, and Piper is worried about him.
    • After chatting with him for a bit, Piper falls asleep, right into a nightmare vision.
    • In this vision, Piper flies to Acropolis, where the giant king Porphyrion is. Porphyrion wears a velour tracksuit like a "thirty-foot-tall mobster" (18.53) or your average resident of Atlanta.
    • The giantess Periboia says that when "the blood of the last heroes is spilled here" (18.71), Gaea shall be raised.
    • That doesn't sound good.
  • Chapter XIX

    Piper

    • Annabeth wakes up Piper, and she tells the ship about her dream.
    • They reach Sparta, and Annabeth and Piper agree to go together for the statue.
    • They find a pair of fire pits, and Piper just dives right into one.
    • Underground, she finds bronze dragon statues spewing flames, and she cuts their heads off, making it safe for Annabeth to descend into a cavern.
    • There, they find the statue, and they hear the heartbeat inside.
    • Before they can do everything, a small giant makes his entrance. And by small, we mean 25 feet tall. He's there to kill them.
  • Chapter XX

    Piper

    • Being in the temple of fear makes Piper and Annabeth paralyzed with fear. Whodathunk?
    • Well, Annabeth is more paralyzed than Piper is, and Piper tries to get her up and moving, running away from the giant, Mimas.
    • Her advice: "You can't think your way out of your emotions" (20.27).
    • They run and fight, run and fight, until Piper makes it back to the statue of Ares.
    • She lays her cornucopia at the statue's feet as a sacrifice.
    • And she cuts off the statue's head.
    • It works. The makhai, the spirits of battle, swirl out of the statue and into Piper.
    • They give Piper the power to kill the giant, so she does. Then she and Annabeth leave the caverns.
  • Chapter XXI

    Reyna

    • After a brief stop on a cruise ship (probably a Disney cruise, let's be honest), Nico shadow-jumps the group to San Juan, Reyna's home. She is not happy to be home.
    • Reyna isn't sure if Nico can shadow-jump again. He is turning into shadow, fading from reality.
    • Before she can formulate a plan, someone shoots her in the neck with a silver dart and carries her away.
  • Chapter XXII

    Reyna

    • Reyna's kidnapper turns out to be Thalia Grace, Jason's sister.
    • She's a Hunter working with the Amazons to thwart Gaea.
    • The Hunters are also hoping to intercept Orion, using Reyna as bait.
    • The Hunters lead Reyna to their leader: Reyna's sister, Hylla.
  • Chapter XXIII

    Reyna

    • Hylla explains to Reyna that Orion is the Hunters' greatest threat. He once loved Artemis. When he died and was reborn, he returned as her enemy.
    • She agrees to help Reyna deliver the Athena Parthenos after Orion is defeated.
    • Problem: Orion is already there. The doors explode, announcing his entrance, and they are so not ready.
  • Chapter XXIV

    Reyna

    • Reyna and Hylla flee as the rest of the Amazons and Hunters defend them.
    • And by defend them, we mean are instantly killed by Orion. Oops.
    • Orion catches up to Reyna and Hylla, and the three of them banter and battle.
    • Nico and Coach Hedge soon join the fray and destroy Orion's giant bow.
    • Hylla and the remaining Hunters agree to delay Orion as long as possible, while Reyna, Nico, and Coach return to the Athena Parthenos and escape.
  • Chapter XXV

    Jason

    • Back on the Argo II…the ship is practically capsized by a violent storm.
    • Percy and Jason agree to head underwater to see what's causing it.
    • Percy can breathe underwater. Jason summons a storm cloud to create a bubble around himself and dives in after Percy.
    • In the deep, they find a 20-foot-tall woman who says that she's Percy's sister and that she wanted to meet him before he dies.
  • Chapter XXVI

    Jason

    • Percy's sister is a minor goddess (don't say "minor" to her face) named Kymopoliea, or Kym for short.
    • She's upset that no one worships her, like she's the least-known dwarf or something.
    • She's working for Gaea now, and her mission is to detain Percy and Jason while Polybotes, the giant who is lurking nearby, kills them.
  • Chapter XXVII

    Jason

    • Jason and Percy destroy Polybotes' swimming basilisks, but when Polybotes poisons Percy, Jason is at a disadvantage.
    • Jason realizes he must bargain with Kym: he promises her a shrine and an action figure.
    • That's enough for her. She decapitates Polybotes in one swoop.
  • Chapter XXVIII

    Jason

    • Kym heals Percy of the poison and warns him that his blood will awake Gaea.
    • Percy and Jason leave, but they rest on the dome of a sunken temple before returning to the ship.
    • Jason realizes that his wound is healed. He's not sure why. Because he honored his friends? Or because he honored both Roman and Greek gods? Who knows? At least he's not going to die.
  • Chapter XXIX

    Nico

    • The latest shadow-jump brings them to South Carolina.
    • Nico is losing his connection with the real world fast. At one point, he accidentally walks through a tree.
    • He and Reyna talk about their past, and Reyna confesses something she doesn't tell many people: that she killed her own father.
    • Someone happens to be listening as she admits this: a Roman legionnaire who makes his presence known, saying that Reyna will be executed.
  • Chapter XXX

    Nico

    • Reyna recognizes the legionnaire as Bryce Lawrence (and she recognizes the Frigidaire as a good place to store ice cream).
    • Bryce is working for Octavian, and he's been instructed to arrest Reyna.
    • She's not too keen on that idea, but Bryce has backup: he summons a load of undead soldiers to fight them.
    • A skeleton restrains Reyna, and Bryce cuts her face with his weapon.
    • That does not make Nico happy. "Nico's rage exploded" (30.47) like a shaken two-liter of Diet Coke.
  • Chapter XXXI

    Nico

    • Nico basically kills everyone and collapses.
    • When he wakes up, Coach Hedge gives him some Gatorade and tells him there's good news and bad news…something everyone loves to hear.
  • Chapter XXXII

    Nico

    • The bad news: Nico has been unconscious for three days. And we thought we liked to sleep late.
    • Reyna is also upset that Nico destroyed Bryce. It reminds her of what happened to her father.
    • But she says it doesn't matter; they're friends, and she trusts him.
    • But because Nico can no longer shadow-travel, Coach Hedge had to call in an alternate mode of transportation: a fleet of Pegasuses. Ahem, we mean Pegasi.
  • Chapter XXXIII

    Leo

    • The Argo II arrives at Delos to find the Curse of Delos, whatever that is.
    • The island is deserted, except for two gods: Apollo and Artemis.
    • Apollo says he can't help them with the physician's cure, and he pitches a fit, smashing his ukulele.
    • Artemis takes Hazel and Frank away but tells Leo that he may be able to bargain with her brother.
  • Chapter XXXIV

    Leo

    • Leo strikes a bargain by bribing Apollo with a brand-new musical instrument, which he calls the Valdezinator.
    • Apollo says he doesn't have the physician's cure, but he has the last ingredient: the curse of Delos…which turns out to be a daisy.
    • If they take the ingredients to Apollo's son Asclepius, he can make the cure for them.
    • Leo regroups with Frank and Hazel at the docks.
    • Artemis has told them that Octavian is planning on eradicating Camp Half-Blood with Cyclopes-built onagers: giant catapults.
    • Leo tells them his plan, but we don't get to hear what it is. Sounds like it has a lot to do with sacrifice.
  • Chapter XXXV

    Leo

    • Leo gets the Argo II airborne, and they fly over the temple of Asclepius.
    • Leo uses a claw for a game of ancient Greek crane game by reaching down and turning and twisting the stones of the temple to unlock a hidden entrance.
    • Down they go: Jason, Piper, and Leo.
    • They reach Asclepius' waiting room, where they're attacked by a statue of Hygeia, who demands to see their insurance.
    • Like most insurance matters, it's a disaster involving snakes, acid, and a giant battle.
    • Leo manages to re-program the statue to destroy itself, and the door to the doctor's office opens to admit them.
  • Chapter XXXVI

    Leo

    • Dr. Asclepius gives them the physician's cure (and he gives Jason glasses. Nice look!).
    • He also lets everyone know they're in good health and will live a nice long life. Well…except for Leo. Sorry, Leo.
    • Back on the Argo II, they agree to let Piper hang onto the vial of cure.
    • Leo wraps the vial in a cloth and hands it to her…
    • Then he goes to the engine room, where he has the real vial, and he hides it in the ship's engine. The one he gave Piper was a trick generated by Hazel.
    • Uh…why are they being so secretive about this?
  • Chapter XXXVII

    Reyna

    • Not wanting to get shot down by the onagers, Reyna diverts her herd of pegasi to a nearby ship.
    • They land on the deck of the small ship. Nico can sense that the two people on the ship are asleep.
    • So they're safe…until a small motorboat putters up and Octavian's welcome committee boards.
    • Michael Kahale tries to arrest Reyna, just like Bryce did.
    • He's about as successful: Tyson, the helpful Cyclops, boards the ship and knocks out Michael.
  • Chapter XXXVIII

    Reyna

    • Tyson and Ella, the harpy, take Coach Hedge to Camp Half-Blood so he can see his wife and let them know that Reyna will bring the Athena Parthenos in at sunrise.
    • Then she gets Dakota and Leila, who accompanied Michael onto the ship, to agree to sabotage the attack on Camp Half-Blood. Nico goes with them to assist the sabotage.
    • Ah…Reyna is all alone on the ship. She gets a moment to think and regroup and…uh-oh, what's that?
    • It's an arrow piercing her pegasus' flank.
    • And another…this one with an explosive device attached.
    • And the thing is ticking.
  • Chapter XXXIX

    Reyna

    • Looks like Orion has finally caught up with Reyna, but he's a little worse for wear after scraping with Hylla.
    • Orion says that Reyna's sister and the Hunters are still alive…but Reyna won't be so lucky.
    • Them's fightin' words…so they fight.
    • Reyna chucks her knife right into Orion's chest; then she grabs her cloak and dives atop the explosive arrow.
    • The cloak somehow absorbs the blast, and a voice speaks, telling Reyna she's proven herself a hero of Olympus. "Accept my aegis" (39.42), the voice says.
    • Reyna isn't ready to co-host a morning show. ("No, not Regis. Aegis.")
    • Ah, the cloak is a piece of Athena's mantle, and it will protect her.
    • Orion recovers and shoots an arrow at Reyna, which she deflects with her now-magic cape.
    • Then she twists the cloak into a rope and strangles Orion to death with it. Dang, girl.
    • No time to gloat—dawn is approaching.
  • Chapter XL

    Reyna

    • Reyna cleans Blackjack the pegasus' arrow wound and heals him.
    • That done, the dawn seems so peaceful. Reyna wonders, for a second, if Octavian decided not to attack.
    • Nope.
    • An explosion signifies that the onagers have fired their first volley.
  • Chapter XLI

    Piper

    • The Argo II docks on the outskirts of Piraeus, and as everyone is getting ready to tromp to the Acropolis, a snake-man shows up. He's like a centaur, except half man, half snake.
    • He brought a bundt cake, so he can't be all that bad, right?
    • His name is Kekrops, he's the original king of Athens, and he says he'll help them get to the Acropolis without being detected by Porphyrion.
    • Piper isn't so sure, so she exercises her pipes (i.e., her voice) and sings a song, charming the snake into telling the truth.
    • Sure enough, it's a trap.
    • The group decides to send Annabeth, Percy, and Piper through the underground tunnels anyway, with Piper singing the whole way to keep the snake people hypnotized.
  • Chapter XLII

    Piper

    • Piper, Percy, and Annabeth reach the Acropolis safely.
    • Frank, who has taken the form of a swarm of bees, flies back to relay to Hazel that they've made it.
    • She uses her Mist to transform the three into monsters; then they split up to storm the Parthenon.
    • Piper takes every opportunity she can to slay monsters and disable weapons along the way.
    • Maybe she should have gone faster; when she arrives at Porphyrion's throne, he's taken Annabeth and Percy hostage. Bad news.
  • Chapter XLIII

    Piper

    • The giants are so focused on Percy and Annabeth that they don't notice Piper at all.
    • She takes advantage of that to attack, chopping off a giant's hand.
    • Then she attacks some more.
    • A huge fight breaks out. Annabeth is cut badly, and she bleeds onto the ground.
    • When it looks like they're outnumbered, their friends show up to even the score.
  • Chapter XLIV

    Piper

    • Fighting, fighting, and more fighting.
    • It's all going well…until it's not.
    • Piper and her friends tire, and the tide of battle turns against them.
    • Percy's nose is bleeding and everyone freezes as one drop falls from his face onto the ground.
    • The earth groans "as the Earth Mother woke" (44.35). Way to go Percy. You shoulda stuck some bacon up there.
  • Chapter XLV

    Nico

    • Nico summons his zombie chauffer (who, even though he's a zombie, is a better driver at his job than this Uber driver).
    • The SUV takes them to where Octavian's legion is stationed.
    • Nico gets out of the car and fades into the shadows so that he can disable the onagers undetected.
    • Bad idea. He almost collapses.
    • Will Solace from Camp Half-Blood shows up and tells Nico that Coach Hedge is fine, and he orders him not to do anymore shadow-traveling.
    • Nico agrees to team up with Will and his friends to finish the sabotage job.
  • Chapter XLVI

    Nico

    • Nico, Will, and the others make it to the first onager, where Nico has an idea: alter their trajectories so that they fire at each other. Brilliant.
    • On their way to the next onager, they have to fight off some monsters.
    • Nico summons skeletons to help, and Will chastises him for using Underworld magic.
    • He gives him "medicinal" (46.40) gum to heal himself. Who knew medicinal gum was legal at Camp Half-Blood?
    • Before they can continue sabotaging, they get caught…by Octavian himself.
  • Chapter XLVII

    Nico

    • Will lets out a piercing whistle, which causes Octavian's dog-men soldiers to instantly dissolve into shadows.
    • Octavian is undeterred. He tries to convince Nico to come over to his side. Nico refuses.
    • Since Nico refuses, Octavian orders the onagers be fired to destroy Camp Half-Blood.
    • Thankfully, they've been sabotaged by others, and they blow each other up.
    • Octavian's people have turned against him and sided with Reyna.
    • Unfortunately, not everyone has the memo.
    • The Camp Half-Blood army shows up and charges, determined to kill the Romans.
  • Chapter XLVIII

    Nico

    • Just in the nick of time, Reyna rides in with the Athena Parthenos and returns it to its place.
    • This stops the fight between the Greeks and the Romans, but it's still too late: Gaea has awoken.
    • The ground turns to fluid as she comes alive.
  • Chapter XLIX

    Jason

    • All the gods show up to assist Jason and his friends.
    • Seriously, guys… all of them: Zeus, Hera, Nike, Ares, Athena, Demeter, Hecate, Hephaestus, Hades, Poseidon, mighty Aphrodite, even the Fates.
    • With the help of the gods, Jason and the demigods wipe out all the giants.
    • Plus, Jason gets to meet his pops, Zeus, for the first time. Family reunion!
    • However, Zeus says that "someone must take the blame for what happened" (49.50). We have no idea what it'll be like to be grounded by a god.
  • Chapter L

    Jason

    • The demigods and gods argue about how stupid it is to try to assign blame when Gaea is awake and will probably kill everyone anyway.
    • Piper even wonders, aloud, "What's the point of being gods if you have to rely on puny mortals to do your bidding?" (50.64)
    • Who you callin' puny?
    • Instead of smiting her on the spot, Zeus agrees to transport them to Camp Half-Blood, where Gaea has chosen to rise. (She's the earth; she can pop up wherever she wants.)
  • Chapter LI

    Jason

    • Zeus picks up the Argo II and flings the whole ship across the Atlantic as fast as he can.
    • As they approach Camp Half-Blood, Frank turns into a dragon and leaps off the ship with everyone but Leo in tow. Leo swears he has a plan.
    • The demigods land, reuniting with Reyna.
    • They're all wondering where Gaea is.
    • Oh, there she is: the ground ripples like it's water, and a giant woman bursts out of the ground.
    • Before she can even give her evil villain monologue, Leo swoops down on Festus, the mechanical dragon who was formerly the figurehead of the Argo II but is now reborn.
    • The metal dragon carries Gaea away.
  • Chapter LII

    Leo

    • Jason summons a whirlwind, and he and Piper swirl into the sky after Gaea, Festus, and Leo.
    • The plan is to get her as far away as they can from the earth, where she derives her power, and eradicate her.
    • She yells and screams a lot but is generally helpless so far up in the sky.
    • Jason uses his wind power to keep her attacks contained in a ball of air.
    • When they reach a great height, Jason starts to lose consciousness because of the lack of air pressure.
    • Leo tells them he doesn't need them. "I told you I had a plan. When are you guys going to trust me?" (52.46)
    • As Jason and Piper descend to earth, Leo ignites some sort of explosion, which turns the sky gold.
  • Chapter LIII

    Nico

    • Meanwhile, Nico and Will have pursued Octavian, who is fiddling with one of the onagers.
    • Octavian plans on shooting down Gaea with the machine…but he doesn't realize that his own robes are tangled up in the contraption.
    • Uh oh.
    • Nico remembers what Hades told him: "some deaths cannot be prevented" (53.39).
    • When Will tries to stop Octavian from firing, Nico tells him that they can't stop him.
    • Octavian cuts the wire to release the device, and—swoosh—off he goes, exploding in a dome of fire.
  • Chapter LIV

    Nico

    • Everything is back to normal with nature, so it appears that Leo's plan worked. Gaea is so "dispersed and powerless" (54.5) that she can't ever take corporeal form again.
    • But everyone is sad that Leo made that sacrifice. Without a body, they can't bring him back.
    • Piper pulls out the cure anyway and realizes that she never had it after all.
    • Nico agrees to do funeral rites for Leo, even without a body, and they all wonder if he found a way to survive.
    • The Greeks and the Romans celebrate together, honoring the new friends they've all made.
    • Aw.
  • Chapter LV

    Nico

    • Nico sleeps in the Hades cabin and decides to stay at Camp Half-Blood.
    • He talks to Frank and Hazel, his sister, and wishes them the best in their new life as they get ready to leave.
    • But Nico wonders if he may have killed Leo when he let Octavian fire the onager.
  • Chapter LVI

    Nico

    • Jason knocks on Nico's door at dawn. He says he'll be going back and forth between the camps…and he has some shrines to build. (Kym will be glad to hear that.)
    • Nico says that he's going to stay at Camp Half-Blood to be head counselor of the Hades cabin.
    • Jason is glad he's staying, but Will interrupts the two of them.
    • He wonders why Nico hasn't come by to visit him in the infirmary.
    • Nico agrees to help his friend (Will calls himself Nico's friend!) and even agrees to rest three days…and let Will take care of him. Wink wink, nudge nudge.
    • Nico goes to talk to Percy and Annabeth, who are hanging out nearby.
    • They're excited to go to college…and stuff.
    • Nico tells them that he's staying behind and admits to Percy that he had a crush on him…but he's over it.
    • Totes.
    • Then he returns to where Will is waiting.
  • Chapter LVII

    Piper

    • Reyna asks Piper, Aphrodite's daughter, if she can make sense of what Venus once told her: "You will not find love where you wish or where you hope" (57.28).
    • Piper can't say for sure, but she tells Reyna not to worry about it. She's awesome how she is, she has plenty of friends, and she doesn't need a boy to make herself whole.
    • Piper, on the other hand, does seem to need a boyfriend, so she returns to her cabin to snuggle with Jason.
    • She's still sad about Leo, but Jason tells her that he believes Leo found a way to survive.
    • He's out there somewhere.
  • Chapter LVIII

    Leo

    • Leo is out there. He died, but the cure brought him back to life.
    • He somehow rigged a needle up to inject him after the explosion.
    • Festus the mechanical dragon is still working somehow, too, and he flies Leo to Ogygia, where Calypso is waiting.
    • Leo makes a dramatic entrance…falling face-first into the sand.
    • Ouch.
    • But Calypso still loves him and she's happy to see him.
    • He asks her to come with him and leave the island.
    • She agrees, not caring whether or not she remains immortal if she leaves. Aw.
    • Leo and Calypso board Festus and soar "into the unknown" (58.58).
    • The end.