Identical on the outside, Joy and Grace Morris could not be more different. Joy is the wild child who revels in angering her parents while Grace strives to be the daughter with stellar grades. Their world is torn asunder with the death of a popular musician at their high school, because Joy believes she caused his death, while drunk, as revenge for his sexual assault of Grace. Joy's fears are confirmed when she receives mysterious notes from a blackmailer, and as the sisters try to learn the truth, they discover grimy secrets just beneath the facade of their seemingly idyllic town.