Batman and Katana team up with Rex Mason (who has been classified as the "Golem of Old Gotham") as they combat an army of armored thugs that have been terrorizing several parts of Old Gotham after they were supplied the high-tech armors from Stagg Enterprises. In addition, they also dodge Harvey Dent's newly-created Special Crimes Unit, which has been ordered to take down both the armored criminals and the vigilantes fighting them.