Rookie detective James Gordon and his partner Harvey Bullock are assigned to the case of the murder of Thomas and Martha Wayne, which was witnessed by street orphan Selina Kyle.
Gordon meets the Waynes' son, Bruce, and promises the boy that he will find the killer. Their investigation leads them to a parolee named Mario Pepper, whom Bullock shoots when he flees and attacks Gordon. They discover that Pepper had been framed, leading them to mobster Fish Mooney, an associate of Don Carmine Falcone. Mooney has them captured, but Falcone spares them upon his arrival. In exchange, Falcone orders Gordon to kill Oswald Cobblepot, a low-level member of Mooney's gang and informant for Gotham MCU investigators Renee Montoya and Crispus Allen. Gordon fakes Cobblepot's death, and tells him never to return to Gotham. Gordon and Bullock are celebrated for solving the Wayne murders, but Gordon confesses the truth to Bruce and his butler, Alfred Pennyworth. As Gordon leaves, Selina is seen lingering around the borders of Wayne Manor.