The precinct is on the lookout for an arsonist; Chano brings in a man who used a deadly weapon on a vending machine.

The citizenry is in a panic amidst the rumors that the 12th Precinct is being shut down; a repentent hood can't prove that he committed a crime.

A neighborhood vigilante group runs amok, and Fish is AWOL on the day of his retirement.

Harris quickly regrets the fact that Dietrich has saved his life; the 12th is asked to assist a thief who has been granted entry into a witness-relocation program.

When the NYPD restructures its precincts as specialty squads, Luger pulls some strings and gets the 12th assigned as a homicide squad. Business is good; a man murders his barber, and a woman hires a hit man to kill her husband, and then changes her mind.

Harris woos the precinct's crime photographer, while Dietrich tracks down the hit man's intended target; Barney's frustration boils over when the new homicide-only edict results in the death of an old friend.