Zeus has punished Apollo by casting him out of Olympus as a mortal teenager with no powers, no godly authority, and a body he finds deeply inadequate. To regain his place among the gods, Apollo must serve the demigod Meg McCaffrey and find and free a series of ancient Oracles scattered across America, each held captive by a different Roman emperor brought back from the dead. Five books that use Apollo's enforced mortality and his long history of careless cruelty as the basis for a genuine redemption arc, set against the largest and most politically complex threat the Riordanverse has faced.