A young Scotland Yard police academy recruit tries to break up a gang of thieves.

A British District Officer in Nigeria in the 1930s rules his area strictly but justly. He struggles with gun-runners and slavers with the aid of a loyal native chief.

Wartime thriller with film noir elements based on a true story as written in A.P. Scotland's autobiography "The London Cage". The plot has greatly exaggerated the actual events of A.P. Scotland's experiences, including the addition of a fictional love interest.