Percy Jackson isn't expecting freshman orientation to be any fun, but when a mysterious mortal acquaintance appears, pursued by demon cheerleaders, things quickly go from bad to worse. Time is running out for Percy. War between the gods and the Titans is drawing near. Even Camp Half-Blood isn't safe, as Kronos' army prepares to invade its once impenetrable borders. To stop them, Percy and his demigod friends must set out on a quest through the Labyrinth.