Trouble-prone teen Percy Jackson is about to be kicked out of school but that's the least of his problems. The gods of Mount Olympus and other assorted monsters seem to have walked out of the pages of Percy's Greek mythology texts and into his life and they're not happy. Zeus' lightning bolt has been stolen and Percy is the prime suspect. Now, Percy and his friends must embark on a cross-country adventure to catch the true thief, save Percy's family, and unravel a mystery more powerful than the gods themselves.