Jason sees camp headquarters and feels like everything is wrong and he doesn't belong.
Drew tries to flirt with Jason, but Jason isn't especially interested, partly because he feels committed to Piper, even though he doesn't remember her.
Chiron the centaur shows up and tells Jason he should be dead. Not a very friendly introduction.
But even though he thinks Jason should be dead, Chiron asks him to come along. Chiron then puts himself in a magic wheelchair that makes him look like a guy in a wheelchair rather than a centaur. We're not really sure why, though, since everyone at camp knows he's a centaur. Whatever floats his boat, though.
Much chatting ensues. Chiron's house has a sentient leopard head which eats Snausages. Cute.
They discover that Jason knows Latin, which is a weird thing for a Greek demigod. Chiron says various ominous things about how Jason is in danger, but won't elaborate.
Jason has a sudden vision of a god who tells him that she took his memory, that he has to free her, and that he belongs to her.
Chiron doesn't see the vision, but when Jason tells him about it he seems to know what's going on.
Before he can say anything, though, Annabeth bursts in to tell them about Piper's vision, and that she's afraid Piper's dead.