Mom never wanted her son Dave to become a policeman. "For all the brains it takes, believe me, you might as well be in business with your uncles." Besides, "All those gangsters and dope fiends and bookies and hatchet murderers and other such goniffs; isn't it possible you could get hurt some day?" Dave and his very superior, Wellesley-educated wife, Shirley, have dinner with Mom in the Bronx every Friday evening. Between the chicken soup and the schnecken, Dave talks about his current cases, and mom's long experience in dealing with scheming butchers, nosey neighbors, and eccentric relatives leads her to a logical solution to the mysteries.