The Memoirs of Sherlock Holmes

A dead young mans affair with a beautiful widow brings odd, dangerous events to his grandmothers house.

Sherlock Holmes and his brother Mycroft investigate the murder of an amanuensis who clutches a pince-nez and whose last words were, "The professor--it was she."

Sherlock Holmes has disappeared into the Highlands, while Mycroft investigates the theft of the Mazarin diamond and Watson suspects a trap in an offer of $5 million to a former professor if he can find a third man surnamed Garrideb.