Bruce Wayne goes to the Gotham City Opera House along with Tommy Elliot, Selina Kyle and Leslie Thompkins. Starting the opera, the main potagonist starts performing strangely until it is revealed to actually be Harley Quinn in disguise. Harley's masked henchmen take control of the orchestra pit and begin spraying the room with gunfire. Bruce, Selina and Tommy all move to conduct crowd control. Harley tries to steal a pendant from around Tommy's neck – an important heirloom he had since he was a child.

Bruce quickly ducks and moves away to change into Batman. He is surprised to see Harley acting in such a violent fashion – a fashion that is quite uncharacteristic of her. While Batman intercepts Harley, Selina changes into Catwoman. Catwoman and Harley bounce all across the stage trying to catch each other, but ultimately Harley shoots Catwoman. Batman races to Catwoman’s side as Harley makes her escape.

Catwoman's wound is superficial and she chastises Batman for letting Harley get away. On her way outside the Opera House, Harley is intercepted by Thomas Elliot, who wants back his pendant. Harley outruns him and Thomas follows her outside the building. Batman runs outside, but the villain is nowhere to be found. Suddenly he hears a gun shot coming from a nearby alley. Running towards the sound of the gun he finds the Joker standing over the bleeding body of his friend Tommy Elliot.

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