Grace Barrett only wanted to escape from her abusive husband and start a new life, but when her car breaks down in the small Illinois town of Black Lake, she is trapped there until it can be repaired. The sleepy little town seems idyllic at first, but the longer she stays there, the more she discovers lies below its surface, and how it ties in to her own family history. Rumours spread that Black Lake was founded by a religious cult which performed a witch hunt one hundred years ago. A crazy homeless man claims to have seen six mysterious girls rising from the lake. Are the witches truly gone? Are they out for revenge? When Grace's husband arrives in town, she immedietly becomes just one of dozens who have mysteriously vanished around the lake. The police must find out whether he has done something sinister, or if the truth could be far worse.