Caroline Lawson is three months away from freedom, otherwise known as graduation day. Until then, Caroline is keeping her head down, pretending to be the perfect student even though she is crushed by her family and heartbroken over the girlfriend who left for California. But when her best friend Madison disappears, Caroline feels compelled to get involved in the investigation. She has her own reasons not to trust the police, and she owes Madison — big time. Caroline has some uncomfortable secrets about the hours before Madison disappeared, but they’re nothing compared to the secrets Madison has been hiding. And why does Mr. McCormack, their teacher, seem to know so much about them? It’s only when Caroline discovers other missing girls that she begins to close in on the truth. There’s only one common denominator between the disappearances: Caroline herself.