It is December 1888. The body of Queen Victoria's physician is discovered in a railway carriage on Paddington Station. Sherlock summons his brother Mycroft to the scene. Sherlock is convinced the crime bears no resemblance to the Ripper murders but when a letter arrives at Scotland Yard, ostensibly from the Ripper, claiming he is the author of the crime, Lestrade doubts Sherlock's wisdom. When the body of Sir James Fawcett, a leading expert on tropical...