Peter Reynolds stars as the son of a respectable British family, who despite his position and privilege chooses to pursue a life of crime. Starting with petty thievery, the misguided young man intends to cap his career with a major casino heist. A policeman (Patric Barr), in love with the young man's sister (Rona Anderson), figures out the boys' intentions and sets about to prevent the robbery. When the chips are down, the malfeasant shows what a rat he truly is, thereby losing whatever family loyalty his sister might have felt towards him. The villain's ultimate demise is befitting his loathsome personality. Produced in England, Black 13 was released stateside by 20th Century-Fox.