The mugging of a councilman leads the detectives to arrest a mobster, who in turn leads Stone and Robinette to corrupt city officials.

When the witness in a jewelry store robbery-homicide fails to appear in court, McCoy suspects foul play until he discovers that the man is a fugitive in a 20-year-old murder case.

When a rap producer is found shot to death in his studio, detectives focus on his protege, whose demos link him and a friend to a second murder. As the investigation unfolds, Southerlyn's opinions put her sharply at odds with both McCoy and Branch.