People in Gotham become worried when Joker decides to become the “Batman” and go after anyone, no matter who they are or what crime he perceives they have done. Seeking to have an arch-rival, Joker soon targets Batman and injects him with a new concoction of his gas called Joker Venom. With the venom soon beginning to affect him and transform him into the new Joker, Batman must recover the venom in order to create an antidote before planning to take down Joker, who soon collides with the Penguin when the latter commits a bank heist.