He dined with the powerful. He preyed on the vulnerable. Beneath a smiling exterior was the horrifying darkness of a sadistic serial killer.

The chilling story of one of the world’s most notorious serial killers told through the words of Gacy himself, those who were forever changed by his unspeakable deeds and those who believe that the full truth remains concealed to this day.

A documentary covering various serial killers including BTK, Jeffrey Dahmer, John Wayne Gacy, Ted Bundy, Son of Sam and more.

"Sam, could you do me a favor?" A seemingly simple request sparks the story that has now become part of America’s true crime hall of fame - the journey of a young lawyer, fresh from the Public Defender’s Office, whose first client in private practice turns out to be the most evil serial killer in our nation's history.