麥迪倫飾演連環殺手，視殺人為藝術，滿屋屍體是他的收藏品。電影分成五章講述其中五次虐殺，以大量對話夾敘夾議，呈現病態殺人狂的精神世界，不忘引經據典，馮特爾甚至引用自己前作片段。以非常手段處理非常題材，鑽進地獄的門縫，見證惡魔的誕生，更重演了名畫裏的但丁渡冥河。

Geraldo Rivera investigates allegations of a widespread Satanic underground in the United States.

"The Devil Worshippers" investigates Satanism and focuses on allegations that there are satanic cults committing crimes and murders in the United States. “Police have been skeptical when investigating these acts, just as we are in reporting them. But there is no question that something is going on out there, and that’s sufficient reason for ‘20/20’ to look into it.”

Something is happening. It is happening nationally and locally. It is an ideology that manifests itself in graveyard desecrations, animal mutilations, human sacrifices and suicide. It categorically involves drug/ alcohol abuse, pornography, sexual perversion, physical/mental abuse, heavy metal music and drinking blood. And it is highly organized. Satanic/Occult organizations (churches) have corporate charters, own buildings, maintain national/ international computer networks, publish magazines/newsletters and hire professional public relations firms to polish their public image. It is both generational and self-styled. Some groups are esoteric while others are pantheistic.