Fleeing internet notoriety, Grace is scooped up by a corporate think-tank where her unnatural gifts can be studied. But disaster continues to stalk her; she's attacked by the faux-demons of a witchy rival, befriended by a half kachina bad boy, and must fend off the advances of a love-struck mothman. If that weren't bad enough, ISIS, a secret society, is raising Hell-and the dead-to get her to the last Halloween party ever. Surrounded by enemies, she must save the world without drawing the attention of the Lord of Shadows, her father.