Danny and his nephew investigate the homicide of a delivery driver who may have been connected to an illegal narcotics ring. Eddie is determined to save the job of a probationary police officer who may be fired for responding to a crime. Frank faces a hard decision when he discovers Gormley is non-compliant with NYPD residency requirements. Erin clashes with her boss when a seemingly rehabilitated criminal from an old case becomes the subject of an armed robbery investigation.