Famed sleuth Sherlock Holmes (Christopher Plummer) is on the trail of serial killer Jack the Ripper in this intriguing mystery featuring a superb cast that includes Donald Sutherland, John Gielgud and James Mason as loyal Dr. Watson. While probing the murders of several London prostitutes, Holmes and Watson discover a labyrinthine conspiracy that stretches from the bordellos to the mental asylums to the halls of parliamentary power.