After this, they reach the island of Polyphemus. Tyson and Clarisse help them save Grover. They also get back the Fleece. Annabeth is injured in the island. But the Fleece helps her to become better. They return to Florida on the hippocampi. Percy sends Clarisse back to camp with the Fleece. Then, Luke captures Percy, Annabeth, Grover and Tyson. Percy manages to contact camp with an Iris-message. In this way, he tricks Luke into saying he poisoned Thalia's tree. Luke almost kills Percy in a fight. Chiron and his relatives, the Party Ponies, save Percy and the others. Chiron becomes the activities director again as everyone knows he is not guilty. The Fleece cures Thalia's tree of its poison. It even makes Thalia live again.