After learning that he is the son of a mortal woman and Poseidon, god of the sea, twelve-year-old Percy is sent to a summer camp for demigods like himself, and joins his new friends on a quest to prevent a war between the gods.
Racing against time to unearth the last four Loculi, Jack and his friends prepare for battle against the seven ancient wonders as well as the Massa who have taken over the Karai Institute and convinced Marco to change sides.