While Gotham is still dominated by powerful crime families, Batman, Captain James Gordon, and District Attorney Harvey Dent join forces to bring down Carmine Falcone’s criminal empire. But a series of murders committed only on holidays disrupts their investigation. Nicknamed Holiday, the killer appears to target people connected to organized crime while remaining impossible to identify. As the months pass, Batman tries to uncover the murderer’s identity while Gotham gradually shifts away from traditional gangsters toward the costumed criminals who will soon define a new era for the city.