Apollo must head to the American Midwest where, rumour has it, a haunted cave may hold answers.
There are a few things standing in his way though. The cave could kill him, or drive him insane.
Oh, and a Roman Emperor, whose love of bloodshed makes Nero look tame.
To stay alive, Apollo needs the help of a mortal goddess, a bronze dragon, and some familiar faces from Camp Half-Blood.
Will he survive the greatest challenge of his four thousand year existence?