In noir-style, verité interviews, Connelly seeks key details about this gruesome quadruple murder with the original detectives, prosecutors, and undercover cops he'd come to know as a young crime beat reporter for The Los Angeles Times.
As the investigation unfolds, weaving in rare archival footage and photos, a colorful cast of characters emerges - famous porn star John Holmes, drug dealers and kingpins, mafiosos, televangelists and multiple celebrities, including Liberace and his boyfriend, enigma Scott Thorson.
In a game of cat-and-mouse, Connelly tries to pin down the facts of Thorson's many larger-than-life and stranger-than-fiction stories. After four decades, Thorson's interview may be the last to help distinguish between the crime and the truth.