After a series of cruel and choking murders occurred, Sherlock Holmes and his assistant - Dr. John Watson - promptly saved the next victim's life and unmasked the wicked face: Blackwood. However, for this bloodthirsty, death did not make him tremble, on the contrary, the death sentence pushed him quickly to complete his dark plots. The more you pursue the clues, the more the detective and the talented doctor deepen into a world manipulated by the dark force and full of scary scientific tools ...