In Rick Riordan's 'The Lightning Thief,' twelve-year-old Percy Jackson discovers his life is a myth come true when he learns he is a demigod, son of Poseidon. Accused of stealing Zeus's master lightning bolt, Percy must embark on a dangerous quest across America with his new friends, Annabeth Chase and Grover Underwood. They face mythological monsters and gods, unraveling ancient prophecies and navigating treacherous challenges to find the true thief, clear Percy's name, and prevent a devastating war among the Olympian gods. This thrilling adventure blends modern life with Greek mythology, exploring themes of identity, friendship, and destiny.