Several days after Sherlock Holmes and criminal mastermind Professor Moriarty go over the Reichenbach Falls, a dead body - identified as Moriarty - is fished out of the water. Two detectives descend on the scene: Frederick Chase, a Pinkerton Agent from New York and Athelny Jones from Scotland Yard.
At the urging of Chase, Moriarty's body is searched for a letter from Clarence Devereux - an American criminal mastermind believed to be in England to join forces with Moriarty. A letter written in secret code is found. Luckily, Athelny Jones - who has intensely studied Holmes' methods - is able to decipher the letter, which has the time and place of a meeting between the evil masterminds. Hoping that Devereux believes Moriarty is still alive Chase impersonates Moriarty at the meeting while Jones is set to follow anyone who shows up.
This maneuver leads the detectives to Devereux's gang and a series of clues point to the location of the American criminal genius, who is essentially untouchable. There's much murder and mayhem in the wake of the detectives' investigations and they work valiantly to nab Devereux while endangering their own lives. This is especially harrowing for Jones, who has a wife and young child dependent on him - but he and Chase forge ahead to a dramatic climax and finale.
Sherlock Holmes fans will recognize many nods to the original stories in this worthy 'sequel', which is entertaining and clever and has the feel of 'real' Sherlock Holmes stories. Highly recommended to fans of the original tales.