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.