An extraordinary document comes to light which for fifty years had been held on deposit by the bankers of the deceased John Herbert Watson MD - better known as Dr Watson.
The document, written by Dr Watson himself, opens in the East End of London in 1888. Three women have been savagely murdered. To calm the public outcry, Scotland Yard approaches London's most eminent detective, Sherlock Holmes, and asks him to investigate the killer.
Can Holmes solve the mystery of Jack the Ripper? And why has this story been suppressed for so long?