Demi-god Percy Jackson and his friends must journey into the Sea of Monsters to save their camp. But first Percy will discover a secret that makes him wonder whether being claimed as Poseidon's son is an honor or a cruel joke.

All Momo wants for her twelfth birthay is an ordinary life, but instead she finds out she is half human, half goddess and must unlock her divine powers to save her mother's life and keep countless evil spirits from escaping Yomi, the land of the dead.