Two interlocking stories telling of one of the creeper locations in Gotham City. In the early 20th century, we see Amadeus Arkham workng to start an asylum in memory of his mother who had suffered from mental illness. Shortly before it opens, a tragedy pushes Dr. Arkham closer to his "inheritence". In modern times; on April Fool's Day the inmates at Arkham, led by the Joker, have taken over the asylum. In exchange for the release of the hostages, they have one final demand: Batman. The Dark Knight must match wits with his worst foes, save the Arkham staff who chose to stay, and face the very real possability that he is just as insane as the inmates.
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