It's a board game where one of you is Sherlock and the other is Moriarty and both of you control the same six dudes. One of them is the Killer and one of them is the Victim and Moriarty has to trick Sherlock into letting him get the Killer and the Victim alone without any of the other four watching while Sherlock has to balance keeping these retards fed and preventing Moriarty from stealing a free kill while deducing as much as he can about who CANNOT be one or the other