First introduced in Detective Comics #168 (Feb. 1951) ("Mystery of the Red Hood"), ACE Chemicals is well renowned as the place the Red Hood died, and in his place the Joker was born.
After falling into a vat of toxic waste trying to escape from Batman, the Red Hood discovers that the chemicals bleached his skin and dyed his hair permanently green. This disfigurement caused a psychotic break and he became The Joker.
Over the years, the Joker has revisited Ace Chemicals several times, using it as a temporary hideout, as in this case. In a scenario not dissimilar to the Lego Batman Game, where the Joker sent Jervis Tetch to retrieve deadly chemicals from the facility, The dynamic duo have tracked the Joker and the Mad Hatter to the old plant.
For more images, follow the link below-
http://imgur.com/gallery/wV2vy1X