When the Gordon family open their door to a stray elk-hound, they unwittingly welcome in the forces of evil. For, according to the local priest, the huge dog is Satan himself, fulfilling an ancient prophecy. 

But no one will believe this warning... Even when sheep — and wolves — are mysteriously slaughtered. Even when frenzied pets turn on their owners. Even when Emily Forrest is savagely eaten alive — the first of many human victims.

As winter tightens its icy grip on the remote town of Kane, its unprotected people must face an unearthly terror.