Holmes, now Britain's famous detective thanks to the Drebber case, suffers nightmares and struggles with solving mysteries. While on a train with Watson and Lestrade, he meets the Moriarty brothers, and a passenger is killed.
Holmes convinces Lestrade to let him escape, revealing evidence of Drebber's murder. Holmes seeks the owner of a stolen ring. Instead of shooting him, Holmes turns him in, earning William's admiration as his nemesis.