When his lightning bolt is stolen, Zeus accuses Poseidon's son Percy Jackson and gives Poseidon's son fourteen days to return it, otherwise he will initiate a war amongst the gods. Meanwhile the teenager, Percy, who is dyslexic and has ADHD is visiting The Museum of Metropolitan of Art and is attacked by a Fury disguised in his teacher. His crippled best friend Grover reveals that Percy is a demigod and that he is his protector and his teacher Mr Brunner gives him a pen telling him that it is a powerful weapon. They go to Percy's house and together with his mother Sally they drive to the Camp Half-Blood. However Sally is attacked by a Minotaur and vanishes before Percy can help her. In the camp, Percy befriends the gorgeous Annabeth; when they are attacked by Hades who wants the lighting bolt for himself, Percy discovers that his mother is in the Underworld with Hades. Percy decides to travel on a dangerous quest to retrieve the lightning bolt and save his mother...