In the aftermath of the Reichenbach Falls, the world believes Sherlock Holmes and Professor Moriarty are both dead. Inspector Athelney Jones of Scotland Yard and Pinkerton agent Frederick Chase team up to hunt down the remnants of Moriarty's vast criminal empire. But as they delve deeper into London's treacherous underworld, they uncover a new mastermind, a shadowy figure more ruthless and cunning than Moriarty himself. They must navigate a web of deceit and murder to stop this new Napoleon of crime before it's too late in this thrilling continuation of the Holmes legacy.