Christopher Plummer and James Mason star in this 1970s crime thriller. In Victorian London, renowned sleuth Sherlock Holmes (Plummer) and his trusty sidekick Doctor Watson (Mason) set out to investigate the case of notorious serial killer Jack the Ripper, and in so doing stumble across a Masonic mystery at the highest levels of society. The cast also includes Donald Sutherland, Geneviève Bujold and John Gielgud.