When Harley Quinn is poisoned, the Joker is forced to take care of her with tenderness and affection, two things the Clown Prince is not known for. With Harley's life hanging in the balance, the Joker is forced to consider whether he loves her enough to change for her, or not.

She's loveable, unpredictable, mischievous and...well, a psycho. She's Cookie Aileen Carlisle, a jovial girl with many personalities. He's stubborn, hard headed and a cruel lad, a no nonsense cad. She's the water to his blazing light, the controller to his madness. She's his perfect antidote.