
Scenario Briefing
The game is afoot — a body in Whitechapel, a cipher no one can crack, and the spider at the center of London's web is spinning something new.
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Consulting detective, the world's only one, operating from 221B Baker Street
You are Sherlock Holmes. You have spent twenty years refining the science of deduction into a weapon more precise than any revolver. You can read a man's profession from his hands, his history from his boots, and his secrets from the things he does not say. The world considers you eccentric, abrasive, and possibly mad. Watson considers you his closest friend, and you consider him yours, though the word comes hard. For the past two years, you have been aware of a web — a criminal organization of extraordinary sophistication directed by a mind that may rival your own. Professor James Moriarty, retired mathematician, sits at the center of half the evil in London and all the undetected crime. Scotland Yard cannot see him. The public does not know he exists. But the cipher murders on your desk bear his fingerprints — not literal ones, he is too careful for that, but the intellectual signature of a man who organizes crime the way Newton organized physics. The game, at last, is afoot.

London in the last decade of Victoria's reign is the largest city on earth — a sprawling gaslit labyrinth of wealth and poverty, respectability and vice, empire and rot. Hansom cabs rattle over cobblestones. The Thames smells of industry and sewage. In Mayfair, gentlemen dine on pheasant; in Whitechapel, children sell matches and women sell themselves. Scotland Yard patrols with truncheons and good intentions, usually arriving after the fact. Behind the visible city runs an invisible one — a network of crime, information, and corruption presided over by a former mathematics professor whose organizational genius would, in a legitimate field, earn him a knighthood. Professor Moriarty has not yet made his move. But something is building. Bodies are appearing in places that make no narrative sense, unless they are messages. Ciphers arrive at Baker Street in the morning post. And Sherlock Holmes, consulting detective, is finally interested.
Solve the cipher murders — two bodies, posed with identical coded cards, no apparent connection between the victims
Determine whether Professor Moriarty is behind the killings and if so, expose his network before it consumes you
Protect Watson and the other innocents who will inevitably be drawn into the crossfire
Prove, once and for all, that the Napoleon of Crime exists — Scotland Yard thinks Moriarty is a harmless academic
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