The thing is, Emily doesn’t know why she’s doing any of this. By day, she’s the same old boring Emily, but by night, she turns into a thrill seeker. With every nightfall, Emily gets wilder until it’s no longer just her personality that changes. Her body can do things it never could before: Emily is now strong, fast, and utterly fearless. And soon Emily realizes that she’s not just coming out of her shell . . . there’s something much bigger going on. Is she bewitched by the soul of the other, murdered Emily? Or is Emily Webb becoming something else entirely—something not human?
As Emily hunts for answers, she finds out that she’s not the only one this is happening to—some of her classmates are changing as well. Who is turning these teens into monsters—and how many people will they kill to get what they want?