Two American backpackers from New York City, David Kessler and Jack Goodman, are trekking across the moors in Yorkshire. As night falls, they stop at a local pub called the Slaughtered Lamb. Jack notices a five-pointed star on the wall, but when he asks about it, the pub-goers become hostile. The pair decide to leave, and the pub-goers warn them to keep to the road, stay clear of the moors and beware of the full moon. David and Jack end up wandering off the road onto the moors, and are attacked by a supernaturally large animal. Jack is killed and David is bitten. The beast is shot and killed by some of the pub-goers, who came out in search for the boys. Instead of a dead animal, David sees the corpse of a naked man lying next to him before passing out.