Sherlock holmes has received a letter from Scotland Yard's Police need help in murder case of women. woman was killed by use a knife and cut into pieces in Whitechapel . Murderer is Jack the Ripper.Holmes had agreed to help investigating the case, which he investigating with Dr. Watson is a friend of his. Holmes assumed Professor Moriarty is murderer but Professor Moriarty that hallucination himself has created Because Holmes drugged cocaine too. Dr. Watson knows that Holmes is a murderer, and to reveal the truth. But before it was revealed that Holmes is Murderer his had died by falls off a cliff.