Due to his charm and skill with a sword, Tantalus becomes the new camp counsellor. As a reward for winning the chariot race, Tantalus sends Clarisse LaRue to find the Golden Fleece and forbids anyone else from leaving camp without his permission. After having a talk with the god Hermes about the fate of his son Luke, Percy leaves camp with Annabeth and Tyson to find Grover. With the help of a hippocampus that Tyson names Rainbow, the trio reach the Princess Andromeda, a cruise ship filled with monsters and demigods that have allied with the titan Kronos. On the ship, they are captured by Luke Castellan, and learn that he is working to revive Kronos. The trio narrowly escapes on an emergency lifeboat, and take shelter in a hideout that Annabeth, Thalia, and Luke built as children. There, a hydra finds and attacks them, but they are saved by Clarisse on her ship the "CSS Birmingham."