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A brutal attack by The Joker kills Catwoman and leaves Batgirl in a wheelchair. Grieving over the loss of his secret love, Catwoman, Batman leaves New Gotham to fend for itself. Afterward, Batgirl redefines herself as "Oracle" and takes the secret daughter of Batman and Catwoman, "Huntress," under her wing. When a third young woman, Dinah, is drawn to the other women with her psychic ability, the trio becomes the Birds of Prey. They commit themselves to battling The Joker and New Gotham's other criminals. Wikipedia