A demonic cult has summoned the ultimate beast, Bigfoot, to prowl the mountains and slaughter innocent victims. But when a young man named Frank is attacked by the creature, the curse of Bigfoot is passed down to him. Now Frank turns into a hairy, fanged beast at night, thirsty for warm blood. Only the power of a nun trained in exorcism can hope to set Frenk free from this nightmare. ] But it may already be too late.