After The Joker's death and most people infected with his toxin have been cured, Gotham is practically destroyed and the crime lords Penguin, Black Mask and the Great White Shark plan on taking over, but first, they have to eliminate Batman, meanwhile Johnny Charisma, who was infected by the joker toxin has managed to evade capture and is working with Scarecrow and the lunatics who escaped from the recently destroyed Arkham to eliminate both the heroes and the crime bosses.
