The gaslight streets of Victorian London. Horse-drawn broughams, hansoms, and dog-carts rattle over the cobblestone streets, pulling their passengers through the pea-soup fog. On every street corner, you pass booksellers, clubs, prisons, music halls, doctors, tea houses, and steamship companies. Yet in the shadows and dark alleys of this great city, horrible and cunning crimes are committed daily, confounding the policemen of Scotland Yard. Still, even the most ingenious crime is only a puzzle for the world's only consulting detective—Sherlock Holmes!