Karen Kuzma–sister of John Wayne Gacy–comes out of the shadows to reveal intimate details of one of the world’s most notorious serial killers. Joined by her daughter, Karen returns to her childhood home in Chicago to disclose formative events in her brother’s life that may have triggered his shocking crimes. In an attempt to find healing, Karen meets with the relative of one of her brother’s victims for the first time, to express her sorrow and remorse.