Zeus has punished his son Apollo by casting him down to earth in the form of a gawky, acne-covered sixteen-year-old mortal named Lester. The only way Apollo can reclaim his rightful place on Mount Olympus is by restoring several Oracles that have gone dark. After experiencing a series of dangerous trials at Camp Half-Blood, Lester must now leave the relative safety of the demigod training ground and embark on a journey across North America.