Adapted from a stage play, rather than from one of Conan Doyle's books, this is a slightly odd portrayal of the great detective. Holmes finds himself about to be married to a society girl, a daughter of a wealthy banker. But marriage has to wait when the arch criminal Moriarty escapes the hangman's noose to unleash Chicago-style violence on the pubs of London. An "Americanised" story that will be unfamiliar to Holmes devotees (and, indeed, to students of London criminology) is, nevertheless, redeemed by some tight direction and excellent performances by Clive Brook as Holmes and Ernest Torrance, a villainous Moriarty. There's quite a memorable opening of Moriarty, in silhouette, being taken to and from the court for sentencing.
An interesting example of an early effort by the industry to put Holmes on the cinema map. And there can't be many films in which Holmes appears in drag!