[6][7] Colonel March, Head of the Department of Queer Complaints at Scotland Yard, is an investigator of unusual criminal cases and activities.

The film sees him solve a bank robbery, for which an innocent man was framed, and two murders involving complex tricks and disguises.

The tricks on which they principally rely are likely to become obvious to the audience rather before the solutions are propounded by Boris Karloff, an old-style mystery man with black eye-patch, sword-stick umbrella and unremittingly suave manner.

"[9] Kine Weekly wrote: "None of the tales is particularly exciting or thrilling, but Boris Karloff, shrewdly cast in the lead, adequately preserves continuity and furnishes essential colour. ...

Yet, despite its shortcomings, the show as a whole is not entirely lacking in variety or surprise and these qualities, strengthened by the resourceful teamwork of Boris Karloff and Ewan Roberts, as Ames, should just get its disconnected jottings over with the hoi polloi.