At the Afterlife Academy of Exceptionally Dark Arts, Lily Fielding is a measly trainee who dreams of one day becoming a Savior—those who visit vampire-infested high schools and put down the undead with their deadly crossbows. When Lily and her classmates Alice and Cara begin their latest assignment, it seems like just another run-of-the-mill gig: they’re to simply spot the Vamplayer—part vampire, part player—identify the popular girl he’s set his sights on, and befriend her before the Vamplayer can turn her to do his bidding. Before long, however, the Vamplayer sets his sights on Lily's friends, and she is left to face the threat alone while protecting her friends from the dark forces she has sworn to resist.