Mortimer Clark, a pathologist finds herself autopsying yet another girl's body torn and ravaged by a large canine. The girls have all been slain on the moon. A werewolf though? That is ridiculous. However, the full moon is drawing near and another body is expected. Day of the moon: a sixteen year old girl will be made to spend the weekend with her grandmother, Lauren Redd. Here she steps into an elaborate trap presented by a killer that is qualified. However, when Lauren cornered, the victim and also the tables turn gets to be the predator. The Redd family goes to any length but Mortimer is following a trail that contributes to the truth: Werewolves do exist, and they have.