Berättelsen utspelar sig i 1970-talets USA, där vi följer psykopaten Jack genom fem incidenter som präglar hans utveckling som seriemördare. Filmen berättas ur Jacks perspektiv, där han betraktar varje mord som ett konstverk, samtidigt som hans dysfunktionella läggning ger honom problem med omvärlden.

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.