On Oct. 12, 1978 Nancy Spungeon, an ex-prostitute, sometimes stripper and heroin addict, was found dead in a bathroom at the Chelsea Hotel in New York. She also happened to be the girlfriend of the Sex Pistols' bassist Sid Vicious, who was quickly accused of her murder. Less than six months later, he died of a heroin overdose, and the case was closed. The deaths of Sid and Nancy have passed into rock legend and have only added to the controversial and notorious image of the Sex Pistols and punk music. At the request of Sid's mother, who committed suicide in 1996, rock author and punk expert Alan Parker has devoted himself to discovering "Who Killed Nancy?" By interviewing 182 people and re-examining NYPD evidence, he reveals what really happened that night in room 100.