When Crystal Donavan gets a message on a mysterious app with a picture of her little sister gagged and bound, she agrees to play the kidnapper’s game. At first, they make her complete bizarre tasks: Steal a test and stuff it in a locker, bake brownies, make a prank call. But then Crystal realizes that each task is meant to hurt—and kill—her friends, one by one. But if she refuses to play, the kidnapper will kill her sister. 

With ailing family to support, Evie Sage's employment status isn't just important, it's vital. So when a mishap with Rennedawn's most infamous Villain results in a job offer—naturally, she says yes. No job is perfect, of course, but even less so when you develop a teeny crush on your terrifying, temperamental, and undeniably hot boss. Don't find evil so attractive, Evie. But just when she's getting used to severed heads suspended from the ceiling and the odd squish of an errant eyeball beneath her heel, Evie suspects this dungeon has a huge rat . . . and not just the literal kind.

Ellingham Academy is a famous private school in Vermont for the brightest thinkers, inventors, and artists. It was founded by Albert Ellingham, an early 20th century tycoon, who wanted to make a wonderful place full of riddles, twisting pathways, and gardens. "A place," he said, "where learning is a game." Shortly after the school opened, his wife and daughter were kidnapped. The only real clue was a mocking riddle listing methods of murder, signed with the frightening pseudonym "Truly, Devious".

Everyone knows the Ivies: the most coveted universities in the United States. Far more important are the Ivies. The Ivies at Claflin Academy, that is. Five girls with the same mission: to get into the Ivy League by any means necessary. I would know. I'm one of them. We disrupt class ranks, club leaderships, and academic competitions...among other things. We improve our own odds by decreasing the fortunes of others. Because hyper-elite competitive college admissions is serious business. And in some cases, it's deadly. 

Kay Donovan has skeletons in her closet, but who doesn't? The past is the past, and now Kay's a star soccer player whose group of gorgeous, pedigreed friends run their private school with effortless popularity and acerbic wit. But when a girl's body is found in the lake, Kay's carefully constructed life begins to topple. The dead girl has left a memento, a computer-coded scavenger hunt, which, as it unravels, begins to implicate each of Kay's friends, until Kay herself is in the crosshairs of the murder investigation.