A group of snowmobilers become trapped on a lake, and hole up in an abandoned camp. What they don't know is that the camp was once used by a satanic cult for its rituals, and is still infested by demons, who begin to kill off the group.A group of snowmobilers become trapped on a lake, and hole up in an abandoned camp. What they don't know is that the camp was once used by a satanic cult for its rituals, and is still infested by demons, who begin to kill off the group.