Exciting brain teaser. The chase is on! Navigate your way through the rooms, corridors and hidden passages of 221B Baker Street to escape through the back window. Sherlock Holmes steps through the quiet streets of London carrying a priceless coin, given to him in gratitude by the British government. Holmes suddenly becomes aware that he is being followed and concludes that one of Moriarty's henchmen has been sent to steal the coin. If he can lure the villain back to 221B Baker Street, he can lead him through a game of 'cat and mouse' before escaping and alerting Scotland Yard to apprehend his captured pursuer.