Delvecchio is the story of a tough, independent big-city LAPD police detective fighting crime in Los Angeles. Sgt. Dominick Delvecchio (played by Taxi and Numbers star Judd Hirsch) and his partner Sgt. Paul Shonski (Hills Street Blues star Charles Haid) are assigned cases that range from narcotics investigations to murders to auto thefts. His boss, and the man who assigns most of his cases, is Lt. Macavan (Michael Conrad, also of Hill Street Blues). Also seen regularly is Delvecchio's father, Tomaso (Mario Gallo), an Old World type who runs a small barbershop and is constantly perplexed about why his stubborn, determined son has become a cop.