Sir William Gull, the doctor of the Royal Family is Jack the Ripper. He has been killing the witnesses to Prince Eddy's (forbidden) Catholic marriage to a whore who bears his legitimate daughter (Alice), who is therefore the heir to the British throne. The Freemasons, a secret society of which Gull is a member, decide to lobotomize him as retribution for his unnecessarily violent and bloody solution to the Royal problem. Mary Kelly doesn't die. Jack mistakes Ada, the Belgian girl, for her and kills her instead. Mary lives happily ever after with Alice in a cottage on a cliff by the sea. Inspector Frederick Abberline dies alone, knowing he is being watched so can never see Mary again without endangering her.