In the late 1970s, New York city businesses were having some trouble keeping wigs on the shelves. Shots had been fired, a killer was on the loose, and the police weren't even paying attention. He went by many names: Mr. Monster, The .44 Caliber Killer, but most infamously, Son of Sam. Was David Berkowitz capable of all of his atrocious crimes? Or was the Devil really to blame?