When Police Chief Nathan Slaughter settles in the tiny mountain community of Potter's Field, Wyoming, his desperate hope is that he has left behind forever the nightmare he barely survived as a Detroit cop. But nothing has prepared him for the horror he is about to confront. It begins with Sam Bodine's mutilated cattle. It continues when old Doc Markle dies from shock. Abruptly, Sam and his family vanish. Townspeople are found without faces. And children go insane. For every time the full moon rises, something all too human and deadly lurks in the mountains, its hour of vengeance at hand...