In August 1977, the arrest of David Berkowitz ended New York City's wave of terror. But journalist Maury Terry believed there was more to the story.

While Berkowitz continues to dominate the news cycle, Maury pursues his theory about John Carr and uncovers a disturbing link to occult activity.

New leads send Maury down a twisted path, investigating a web of cults. As a "satanic panic" grips the nation, he publishes a book.

In 1993, Maury interviews the elusive Berkowitz, who substantiates his theories about the cult. But his obsession with the case begins to take a toll.