A pathologist, mortimer Clark finds himself autopsying another adolescent girl's body torn and ravaged by a puppy. The girls have been slain on the moon. A werewolf though? That's ridiculous. However, the full moon is drawing near and another body is expected. Day of the moon: Lauren Redd, a sixteen year-old girl is being made to spend the weekend. Here she steps into an elaborate trap laid out by a manipulative killer. However, when Lauren's finally cornered, the tables turn and also the sufferer gets to be the predator. Now the Redd family will go to some length hide their loved ones and to protect their daughter but Mortimer is following a trail that leads to the horrific truth: Werewolves do exist, and so they have.