Percy Jackson, a kid who always finds trouble in school, learns that his father is actually a Greek god, and he is a demi-god. He travels to Camp Half-Blood to seek refuge from the monsters that are always after him.
I don't have the bolt. I don't even have my helm!
At Camp Half-Blood, he meets many other half-bloods, born of the Olympian gods. Percy trains with the other campers. He learns that someone has stolen Zeus' lightning bolt, and as the son of Poseidon, he is blamed for it!
Percy begins a quest with Annabeth, daughter of Athena, and his satyr friend Grover, to recover the lost master bolt and prevent war between Zeus and Poseidon. Percy has only had a few days of training, but he has to save the world.
My master Kronos will destroy the gods!
You won't get away with this!
The trio travel far and wide and battle against many monsters. They reach the Underworld in Hollywood and confront Hades about the missing master bolt. Hades does not have it and accuses Percy of stealing his own helm of darkness!
The heroes escape the mighty Hades and discover Ares on the beach. Ares had stolen the helm of darkness and master bolt from the original thief. Percy wounds Ares and wins the helm of darkness. Percy and friends return the helm and bolt to their owners.
Luke confesses to Percy that he stole the master bolt and helm of darkness. Luke actually works for the titan Kronos, who is planning to start a war between the Olympian gods. The mystery of the "lightning thief" has been solved, but a greater threat remains.