Keeping secrets ruined her life. But the truth might just kill her.

Piper Woods can't wait for the purgatory of senior year to end. She skirts the fringes of high school like a pro until the morning she finds a notebook with mutilated photographs and a list of student sins. She's sure the book is too gruesome to be true, until pretty, popular Stella dies after a sex-tape goes viral.

Everyone's sure it's suicide, but Piper remembers Stella's name from the book and begins to suspect something much worse. Drowning in secrets she doesn't want to keep, Piper's fears are confirmed when she receives an anonymous text message daring her to make things right. All she needs to do is choose a name, the name of someone who deserves to be punished...