Ernest Wright's peerless prowess as a locksmith comes to the attention of a tough big-time crook, who feels that the little man would be a valuable asset to his crime kingdom. In order to inveigle him into a series of jobs, he sets up a beautiful hostess as a trap, into which the hapless Ernest inevitably falls..!

• Associated British Picture Corporation
• Charlie Drake
• Nyree Dawn Porter
• George Sanders
• Eddie Byrne
• Percy Herbert
• Dennis Price
• Patrick Cargill
• Ronnie Barker