To prevent Inspector Lestrade's dangerous antics and police chases, Grayson has assigned her a new partner ""fresh out of the academy."" As the Scotland Yard's security becomes compromised, the rookie keeps bumbling, making mistakes and getting in everyone's way. Is he really what he seems to be?
Moriarty and Fenwick steal the Mazarin Chip, a microchip which can be used to create virtual environments instantly, and kidnap the Prime Minister. Holmes uses a waxwork likeness of himself to catch Moriarty in a trap.
The Beryl Board, a new computer processor, has been stolen from the home of Mr. Holder. Holder accuses his son, Arthur of stealing the board, which was found in his possession with apiece broken off. It is up to Holmes, Watson, and the Baker Street Irregulars to clear Arthur, and to expose the one he has been hiding.
Inspector Lestrade learns Alice Murphy is engaged to their old teacher, Prof. Jacob Presbury. The professor is moody and forgetful. His daughter is jealous. Family friend Trevor is over-protective. Meanwhile Holmes investigates three monkeys stolen from the Primate Shelter, stolen as it turns out by Trevor who wants Alice for himself and so turned Presbury into an apeman.
During a car chase, their quarry vanishes. Then our heroes get a call that a wealthy man's car (The Napoleon) was broken into and vandalized. Not stolen, and precious gems are ruined nearby.
A blood regenerating device is stolen from the safe of a scientist named Victor Hatherley. Hatherley's thumbprint is needed to open the safe.