After an unexpected adventure in New Year’s Miracles, Harley Quinn returns to the real world with determination and a distinct plan. She feels she has been used by Santa and decides it is time for revenge.

Harley, full of determination and thirsty for revenge, begins to prepare a devious plan. Dressing up in her favorite clothes and tying up Santa this time, she wants to create her own version of a holiday filled with chaos and surprises.