While Jason and Percy fend off the Romans, Leo guides the ship. Annabeth shares that a Nereid told Percy to seek help from Chiron’s brothers, the Party Ponies, and provides the coordinates for Leo to plot. When they are finally out of immediate danger, Coach takes over the controls so Leo can rest. Leo notices Frank and Hazel arguing, but they stop when the group reconvenes. The ship is on the open sea but, due to damage sustained in Charleston, is unable to fly. Percy reveals that the Nereids told him to expect an attack by Keto’s children, sea monsters.

Jason and Percy are both exhausted from their efforts during the battle. Frank helps Piper and Annabeth bring them to their cabins, leaving Hazel and Leo alone with Coach. Hazel tells Leo that he reminds her of Sammy, someone she knew from her previous life, and offers to show him a memory that she experiences as a flashback, hoping this will help them figure out how they are connected. Leo takes her hand, “and the world dissolve[s]” (193).