Ali and Frank try to connect the murder of a sex worker in Blood Alley to a serial murderer they investigated years before. Bailey's daughter sees Mickey and Bailey kissing on a crowded sidewalk and confronts them.
Frank and Ali reopen the case of Leonard Larkin, whose son was acquitted of his murder and now claims his sister killed their father, and that her husband gave her a false alibi. Mickey's case is referred to Homicide.
Ali and Mickey reopen a 12 year old case, which was originally judged a murder-suicide, based on the word of an arrested drug dealer. After a man reports being attacked by a dog, Frank investigates whether the dog-owner earlier had killed his wife by ordering the dog to attack her.