Finch Chamberlin is the newest transfer student to the ultra-competitive Ulalume Academy. Before school started, Finch and her parents got into an accident that should have left her dead. But something monstrous, and ancient, and terrifying, wouldn't let her die. Finch doesn't know why she woke up after her heart stopped, but ever since she's felt a constant pull to the town of Rainwater. Selena St. Clair rules Ulalume Academy. She’s careful not to let anyone get too close to her … until she meets Finch. The two girls are instantly drawn to one another, even though Selena fears letting Finch in truly will change everything. One night Finch, Selena, and her friends accidentally summon a creature of immense power in the depths of the school. It promises to grant every desire the girls have kept locked away in their insecure hearts, but for a terrible price. As the cost of their wanting becomes more deadly, Finch and Selena must learn to work together to stop the horror they unleashed, before it consumes the entire island.