Percy Jackson & the Olympians: The Lightning Thief

At the top of the Empire State Building, Zeus meets Poseidon, accusing Poseidon's demigod son, Percy Jackson, of stealing Zeus’ master lightning bolt. Poseidon reminds him that Percy is unaware of his true identity, but Zeus declares that unless his master bolt is returned to Mount Olympus in two weeks' time, war will be waged between all the gods.