An ex-con searching for a hidden jewel is assumed by a group of people to be investigating them.

Inspector Bradley of Scotland Yard is on the trail of the murderous ringleader of a smuggling organization in London.

A German submarine is sent to the Orkney Isles in 1917 to sink the British fleet.

London’s jewel thieves are under the thumb of a mysterious fence, who ruthlessly exposes any thief who crosses him. Desperate, Scotland Yard re-hires ex-Inspector Barrabal who, as a known drunkard,…