Margo hasn't been back to Lake Moss since her friend went missing. But as she returns, the news breaks. Her hometown's swimming hole has been Jessie's grave for fifteen years.

Digging out her old diary, and steeling herself to face unfriendly ghosts from her past, Margo sets out to help a documentary crew as they return to investigate the infamous case the police bungled.

In a town where everyone knows everyone, the killer is certain to be close to home. But the question is: How close?