On the election trail, Harvey Dent gradually loses control of his repressed evil alternate personality until gangster Rupert Thorne inadvertently unleashes it.
After being knocked out in a mysterious warehouse, Batman wakes up in a world where his parents are alive, he is engaged to Selina Kyle, and someone else is Batman.
A district attorney who loathes Batman is forced to defend him in a twisted parody of a trial run by the inmates of Arkham Asylum who have seized control and taken them both prisoner.