Kelly begins moonlighting as a security guard for Susan Wagner, a wealthy woman who's married to an abusive husband. But things take a turn when the husband is shot and killed, and Mrs. Wagner becomes a suspect. Meanwhile, Sipowicz is paired with the hard-nosed Detective Walker who arrests a man for a robbery and double-murder. While Detective Walker thinks he's guilty, Sipowicz thinks differently. Laura quits her job and plans to move into a position with the District Attorney's office, prosecuting narcotics. The increasingly edgy Josh Goldstein has Kelly appear at a tenant's readiness group regarding crime, and he is later killed trying to save an elderly woman from a mugging on a subway platform.

The mob hit man who killed Giardella and who Laura can identify, is trapped on the roof of the building with a hostage. Martinez works on his first detectives case, which involves a fake ATM machine taking peoples money. Meanwhile, Fancy and his wife prepare to face a court date when a foster child they've been caring for is ordered back into custody of the real mother who's just been released from a drug rehab program. Sipowicz and Kelly investigate a shooting of mobster Tommy Linardi, whom had taken over the late Angelo Marino's organization, in which turns up a notebook that Marino kept which has Janice's name in it. Janice asks Kelly for help who decides to steal the notebook to protect her from further investigation to Marino's murder, while Fancy again locks horns with Inspector Lastarza over the handling of the case.