Once upon a time Granny was attacked by a werewolf. Eighteen years later her grandson, Aiden Young, arrives in Indiana for his aunt's funeral, and his unfortunate discovery of the family secret leads to a fatal mistake. Before the weekend is over, he's trapped by a blizzard along with his superstitious cousin, Diesel, and Scarlet, Diesel's manipulative girlfriend. In his grandmother's spooky, old house in the middle of the woods, the teen faces life and death decisions: who can be trusted, and who needs to be saved? However, he must first figure out what the true monster is... werewolf or...