Percy Jackson finds himself in trouble again when he is blamed for destroying his school.When he goes to camp , he learns that it's borders are failing.He takes it as a challenge to travel to the sea of monsters to retrieve the golden fleece where it is guarded by a Cyclops? Will Percy be able to return to camp safely or will Luke capture him?

This book speaks about the story of Percy Jackson on a quest with his brother, Tyson, a Cyclops and his friend Annabeth, to save his satyr (also his best friend), Grover captured by the Cyclops, Polyphemus and retrieve the golden fleece, cure Thalia's tree and save camp from an expected titan attack.