"Conversations with a Killer: The John Wayne Gacy Tapes" is a biographical documentary film based on true events. It revolves around a man who was successful in society and had a knack for winning people over. He dined with the most prominent individuals of his time, but at the same time preyed on the most vulnerable. Few knew about the dark side of his life. It was only years later that it was revealed that beneath his friendly and familiar facade, he was a ruthless sadist and serial killer.