Quick recap
On April Fools' Day, the inmates take over Arkham Asylum, and the Joker demands Batman come in alone in exchange for the hostages. Inside, Batman gets an hour to hide before he's hunted, running into Clayface, Scarecrow, the Mad Hatter and Killer Croc. Alongside, the diary of Amadeus Arkham, the asylum's founder, tells how madness took him after he lost his mother and his family. In a tower room, Batman learns that administrator Charles Cavendish staged the riot, convinced he had to finish Arkham's work. Therapist Ruth Adams kills him to save Batman. Two-Face flips his coin and sets Batman free, and the inmates go back to their cells.
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