Wedding time! We're back at the same inn where Danglars and Fernand hatched their plan, though this time things are going down in a big banquet room upstairs.
A big crowd of Edmond's friends is there, including a bunch of sailors from the Pharaon, Danglars, Caderousse, and even M. Morrel.
When everyone arrives, Danglars and Caderousse are sent out to find Edmond, Mercédès, and Edmond's father. They're all looking great. A particularly grumpy looking Fernand is also there, accompanying Mercédès. He's looking significantly less great.
Edmond is so overwhelmed by the awesomeness of the day that he can't help but think he's a little too lucky. Everyone tells him to stop worrying.
Now, Edmond lets everyone in on a little secret: he and Mercédès are getting married in half an hour thanks to a little monetary help from M. Morrel (a marriage license ain't free, after all). Everyone gasps, but Danglars and Fernand are totally shocked.
Danglars can't believe it's all been arranged…but it has, and Edmond and Mercédès quickly set off for the Town Hall; Edmond has no time to lose, as he's supposed to leave for Paris the next day.
Just as the happy couple are saying their goodbyes, the cops come through the door; they've got a warrant for Edmond's arrest.
Everyone is shocked, again.
Edmond asks why he's being taken in, but the cops don't even know.
When the elder Dantès begs and pleads with the police commissioner, he's told it's probably not even that big a deal.
Meanwhile, Caderousse realizes that this might have something to do with Fernand and Danglars's "joke." Danglars tells him to shut up.
Edmond stays calm and tells everyone he'll be all right. The cops take him down to a carriage and they head toward Marseille. Edmond can hear Mercédès call his name as he rides off, and he gives her a last goodbye.
Caderousse suspects that Fernand is responsible for the scene, and he tells Danglars as much. Danglars tells him to shut up again.
Danglars himself tells everyone that he's probably just been taken in because of some smuggled goods.
Morrel, who had accompanied Edmond down into Marseille, comes back with some bad news. Edmond, he tells the group, has been accused of being a Bonapartist.
Now Caderousse is really suspicious; Danglars threatens him once again, and Caderousse finally decides that it's in his best interests to keep his mouth shut.
After the party disperses, Morrel has a brief discussion with Danglars. Danglars assures Morrel that he told no one about Edmond's visit to Elba; he also assures him that he can and will take command of the ship when the time comes.
After Morrel takes his leave, Caderousse and Danglars are once again left alone. Danglars reassures Caderousse that they are not responsible for what's happened; if anything, Fernand is guilty, and that they needn't worry about being implicated. As far as he's concerned, everything is going according to plan.