Peter Reynolds is the screwed-up son of a college professor who turns to a life of crime after killing a pedestrian in an automobile accident. His crime spurt is petty until one results in the killing of the night watchman at the college. Roma Anderson, secretary to the professor, is heads-over about Reynolds but he is more interested in a night club entertainer. Reynolds, keeping with the family-affair motif, meets a bad end while being pursued by an undercover agent who is his sister's boyfriend. Title refers to a roulette-wheel call. They did refrain from rolling an 8-ball across his path.