Protecting Chicago from the dark side can be an exhausting job, especially when you're a sophomore. So when the girls of St. Sophia's start gearing up for Sneak, their fall formal, Lily decides to join in on some good, old-fashioned party prep - even if it means not giving demons, vampires and the twisted magic users known as Reapers her undivided attention. But when a Reaper infiltrates the school, Lily doesn't forget what she's sworn to protect. She reaches deep into herself to draw out her magic - and finds that it's gone. And it turns out she's not alone. A magical blackout has slammed through paranormal Chicago, and no one knows what - or who - caused it. But Lily knows getting back her magic is worth the risk of going behind enemy lines ...