Annabeth, Percy, and Tyson join Clarisse's quest and journey to the Bermuda Triangle (also known as Sea of Monsters). In order to enter the Sea of Monsters, the ship tries to pass between Charybdis and Scylla, who attack and destroy it. It appears that Tyson and Clarisse are killed in action, so Percy and Annabeth board a life raft and head to the nearest island. Like Odysseus, after travelling through the narrow strait that Charybdis and Scylla guarded, the two land on the island of the witch-queen Circe. Realizing she has turned dozens of men into guinea pigs, they escape on the famous Queen Anne’s Revenge, a former pirate ship. Percy and Annabeth pass the Sirens, and Annabeth confesses her insecurities to Percy. They reach the island of Percy's half brother, the cyclops Polyphemus. Before journeying to the centre of the island, Percy and Annabeth meet Grover pretending to be a female cyclops to trick Polyphemus into not eating him. They also learn that Clarisse and Tyson are alive. They find the Golden Fleece and narrowly escape to the mainland while fighting Polyphemus. Percy gives the Golden Fleece to Clarisse as a token of friendship, as it was her quest. She takes a plane to Camp Half-Blood, but the others are soon captured by Luke Castellan. Percy manages to send a message to Camp Half-Blood in which Luke admits to poisoning the tree of Thalia. The elders see their mistake and reinstate Chiron as camp counsellor. When Luke finds out, he challenges Percy to a duel. As Luke was the best swordsman in camp before he left, he wins easily. As Luke is about to finish off Percy and the rest of the group, a group of centaurs called the Party Ponies, led by Chiron, appear and whisk the group to safety. The Golden Fleece is hung on the tree of Thalia, and the tree is cured. However, the Fleece's magic is too strong and resurrects Thalia, providing another possible demigod for the Great Prophecy.