London, October-1894A pair of cryptic messages lead Sherlock Holmes and Dr. Watson to a destroyed photographer's studio and into an assassination attempt. Their only clue to unravel the mystery is a damaged photograph plate bearing a post-mortem portrait of a dead shipping magnate and his grieving widow. With no time to lose, the game is again afoot-with death and destruction threatening to explode from the looming shadows of a war to end all wars...