A young couple inherit a house in the mountains of western North Carolina near a small town settled by eastern Europeans in the 18th century. They laugh and shrug off a local myth of a werewolf that roams the valley when the moon is full. Days later the husband is bitten by an animal while hiking, and the locals warn Peggy that he may have been bitten by the werewolf and become one himself at the next full moon. She is terrified when he begins acting strange as the full moon nears.