Simone and Sipowicz help a local FBI agent, named Mike Frances, to investigate the murder of a local Italian mobster. However they are forced to commit robbery while working undercover for Agent Francis, and have to place a bug in the mob hangout. When two wise guys come to the station to file a robbery complaint, Russell and Medavoy catch them in the act of filing a false report. Meanwhile, Donna's hairdresser, Marina, tells her that she has a problem with her ex-boyfriend. He wants to hijack Marina's current boyfriend's truck, and Martinez goes undercover as Marina's boyfriend. But Lesniak is unable to hide her jealousy and possessiveness. Elsewhere, Andy Jr. learns more about being a beat cop with more pointers from his father Sipowicz Sr.

Simone and Sipowicz try to conduct their investigation in the midst of racial turmoil in the station and the neighborhood when a young white teenager is murdered in a black neighborhood during a drugs-for-guns deal that went bad, and the victim's racist father comes to the station and begins quarreling with Lt. Fancy over his race and roll in the investigation. Meanwhile, Medavoy and Kirkendall investigate the strangulation and dismemberment of the mother of a young boy, who's discovered his mother's body in the refrigerator. Also, Russell decides to take some time off since she's feeling ill due to pregnancy morning sickness, only to suffer a miscarriage at the end.