Arkham Asylum was the Joker's intended destination from the moment he let Batman bring him in. Once inside, the plan unfolds: Harley Quinn seizes control of the security systems, the gang floods the facility, Gordon is taken hostage, and bomb threats across Gotham guarantee Batman has no backup. He pushes through alone — through the Scarecrow's fear toxin, through Titan-enhanced Bane, through each wing the Joker holds — until there is nothing between him and the man who arranged the whole thing.