When a police officer is fatally shot 3 days before he is due to retire, Stone undertakes a relentless search for the killer.

A gang takes Mike Stone hostage after killing a policeman in an attempt to flee from a grocery store robbery. They want to trade Stone in for their leader, Buddy Sims.

While investigating a lead, Steve is run over by a car and rendered a vegetable. Mike insists on taking revenge, and is demoted to walking a beat.

A mobster's son steals loot from his father and seeks protection from federal authorities in exchange for being a material witness against his father.