Victor Lucas has a lot of money for a glorified cab driver. When he's murdered and the safe he has in his flat is found to have been broken into and emptied, Scotland Yard, in the person of Ballard Berkeley investigates, with visiting Yankee copper Dermot Walsh (sporting one of those sourceless accents the British think American) goes undercover to investigate the seedy and customer-free Blue Parrot bar.
It's a pretty poor example of British crime drama, with Berkeley droning his lines, Walsh's accent variable, and pretty Jacqueline Hill as whatever the Brits call a b-girl. Shot flatly by cinematographer Robert Navarro, there's very little to recommend this bog-standard B movie. John Le Mesurier tries his best as the foreboding club owner, but it becomes apparent early on that figuring out what racket the bar is fronting for is the point of the movie, and by the time it was revealed, I didn't care.