A prostitute accuses a detective of blackmailing her for sex; Goldblume searches for a missing child; a former gang leader returns to the Hill as crusading social reformer; Belker busts a purse snatching orangutan and keeps in touch with an undercover rookie planted inside a volatile street gang; and Furillo and Esterhaus question their current romantic involvements.

Goldblume meets a lonely woman while driving a cab undercover; LaRue and Washington use a desperate snitch to solve a prostitute murder; Virgil reports on Hudson's takeover of the Black Arrow gang; and Furillo and Joyce meet socially after splitting up.

Hill and Renko handle a domestic call involving an old man threatening his neighbors with a shotgun; Hudson looks for the informer in his gang; and Joyce asks Furillo for advice about the Downey case.