A rich girl's fiancé poses as a chauffeur to stop her eloping with a major.

A popular aristocrat has been killed, but no one can learn how. No one, that is, until the return of Sherlock Holmes.

A desperate, but highly respectable schoolmaster collapses at Holmes' door. His prize pupil, the son of a wealthy duke, has vanished, seemingly without a trace. And, why is Holmes getting such poor cooperation in his investigation?