Suddenly able to see demons and the Shadowhunters who are dedicated to returning them to their own dimension, fifteen-year-old Clary Fray is drawn into this bizarre world when her mother disappears and Clary herself is almost killed by a monster.
Guided by the handsome Apollo, Daphne journeys across ancient Greece to recover nine mysterious items stolen from Mount Olympus before the gods lose their powers and throw the mortal world into chaos in this reinterpretation of the Greek myth.