After a Minotaur attack at Montauk leads to his mother's disappearance, Percy arrives at Camp Half-Blood . Part 2: Life at Camp Half-Blood (Chapters 5-9)
Percy obtains magical pearls and gets past Cerberus, finding Hades' realm.
The trio battles Medusa and receives assistance from a water spirit.
Percy learns Chiron is his trainer, discovers his water-based powers, and makes friends like Annabeth.
The group is tricked by Ares, escapes the Lotus Casino, and continues to the Underworld. Part 4: Into the Underworld (Chapters 17-20)
