Sherlock Holmes sat in his armchair, his mind racing with possibilities. For months, he had been searching for the elusive consulting criminal, the only person in the world who could offer him a challenge. As he paged through his notes, he realized he had received a message from an unknown source.

The message included a location, a discrete alley on the outskirts of London. With a sense of unease but thrill, Sherlock made his way to the location. As he turned the corner and approached the alley, he saw a figure standing in the shadows.