After Annabeth's death at the end of the Giant War, Percy goes home and grieves, learning to move on with his live. Meanwhile at camp, Nico decided to stay and while he didn't come out, he still had a good year. Now it's June and everyone is back on the Argo II for a check in mission just to make sure everything is okay over in Europe. Without Annabeth, Percy's doing okay, although the others get a bit worried. In all reality, though, he's just happy that Nico's back.