Clark and McDowell suspect a sixteen-year-old prostitute's involvement when a respected physician is murdered. Meanwhile, Sipowicz, who's avoiding McDowell after their recent kiss, investigates the murder of a rehabilitated felon whom he had long regarded as a foe; Baldwin is devastated by personal events but restores his friendship with Greg; Rita's husband swears he'll make her life miserable when she says her divorce decision is final; and PAA John's replacement in the squad is not much liked by anyone.