Batman tries to save Rex Mason from transforming into the villain Metamorpho after he mistakenly ingests a highly dose of toxic chemicals.

Batman and Katana team up with Rex Mason, also known as the "Golem of Old Gotham", as they combat an increasing army of armored thugs that have been terrorizing several parts of Old Gotham. In addition, they also dodge Harvey Dent's newly-created Special Crimes Unit, which is ordered to take down both the armored criminals and the vigilantes fighting them.

When Alfred is taken hostage by Deathstroke in the Batcave, Batman must face him alone. Harvey Dent reveals his true nature as Two Face.