改编自H.P. Lovecraf的同名短篇小说。William Sanderson扮演乔Joe Slaader -一个神秘的山地人，在他残忍的杀害家人后，被关到北爱尔兰郡的收容所。年轻的实习医生Edward Eischel，在这个新的收容者身上看到的不仅仅是天生的杀人狂。相反，他把他视为某些更可怕力量的通报者。尸体堆积如山，他的工作处于危险之中，并且他的健全神智变的恍惚，对Joe隐藏的力量着魔，每一步都是冒险……

Joe Slaader is a mysterious mountain man being held in the Ulster County Asylum after the brutal murder of his family. Edward Eischel, a young intern, sees something more than just an inbred monster in this new inmate, however. Instead, he sees him as the harbinger of some greater and much darker force. With bodies piling up, his job in jeopardy, and his sanity hanging in the balance he gives in to his obsession with tapping into Joe's hidden power, risking all that he has along the way.