A physician is forced to operate on a mystery figure under shady circumstances.

An actress and an artist are linked by his brother to deadly smugglers sought by Scotland Yard.

When Dr. Howard Latimer finds the German actress whom he had just met at the London Airport murdered in his flat, he is led into a world of murder, blackmail, and a fake passport scam.

A fiction writer begins working on a biography of a pilot who went down during the test flight of a new plane and finds himself soon involved in a series of murders.