Percy is claimed as a son of Poseidon and is assigned a quest to find Zeus's stolen master bolt. Part 3: The Quest to the West (Chapters 10-16)
Percy learns Chiron is his trainer, discovers his water-based powers, and makes friends like Annabeth.
The trio battles Medusa and receives assistance from a water spirit.
Percy obtains magical pearls and gets past Cerberus, finding Hades' realm.
Hades reveals the bolt was planted in Percy’s backpack; Percy defeats Ares to recover the Helm of Darkness. Part 5: Olympus and the Aftermath (Chapters 21-22) The Lightning Thief Chapters One–Three Summary & Analysis