Steampunk Holmes: Legacy of the Nautilus

In an alternative Steampunk universe (c.1885), the plans for Captain Nemo's mysterious Nautilus submarine have been stolen from the British Secret Service. There is only one man who can solve the case, Sherlock Holmes. With his bionic side-kick Doctor Watson, and his brilliant and lethal sister, Mycroft Holmes, Sherlock unravels a mystery that will shake the foundation of the British Empire.