Sipowicz and Sorenson are disgusted by two cops who may have beaten a man to death and expect investigators to cover for them when their stories don't pan out. Meanwhile, a grieving Sipowicz and his young son, Theo, struggle to adjust to life at home without Sylvia; and despite her better judgment, Detective Jill Kirkendall contemplates a reunion with her ex-husband Don. Danny meets a uniformed officer named Mary Franco and they hook up in a limited, awkward fashion.

Russell, Kirkendall and Martinez sense that a young boy is being exploited by his adult teacher. Meanwhile, Sipowicz, Sorenson and Medavoy investigate the vicious murder and castration of an out-of-towner who hired male prostitutes on his frequent trips to New York City, while Andy and PAA John Irvin find an effective way to deal with some firefighters who might have taken more than evidence from the crime scene.