Ed Harwood, a wisecracking private investigator from New York, discovers a crime at a hotel in Nice during a carnival. The unraveling of the mystery which lies behind will lead him and Caryl Fenton, a female insurance agent, who will become his companion, first to Paris, then to London, later through the English countryside and finally to Southampton, in search of a criminal train wrecker.
- Genre: Thriller, Crime
- Studio: Gaumont-British Picture Corporation
- Keyword: london, england, countryside, private investigator, sabotage, insurance agent, train wreck, disappeared corpse, nice france
- Cast: Edmund Lowe, Constance Cummings, Thomy Bourdelle, Henry Oscar, Felix Aylmer, O.B. Clarence
