At the end of the 1970s, New York was rocked by a series of brutal murders, for which David Berkowitz, who calls himself 'Son of Sam', is eventually arrested. Journalist Maury Terry, who has a lifelong obsession with the case in question, is convinced that Berkowitz did not act alone. During his quest, he finds out if Berkowitz had help from members of a satanic cult in carrying out the murders.