Scotland Yard Chief Inspector Johnnoe is investigating a string of bank robberies but the robbers are determined to compromise Johnnoe and the investigation.
When the detective in charge of investigating a series of bank robberies, starts to get too close to the culprits, they set up a blackmail scheme to warn him off. But when the crooks begin to fall out with each other, the police learn the truth.—<mike.wilson6@btinternet.com>