Robin's and Zatanna's fortunes change as they accompany the most awesome rescue team in Christmas history: Mary Marvel! Robotman! Metamorpho! Etrigan the Demon! Following the greatest tracker of the north, Mrs. Claus. All our heroes come together in the Hollow Kingdom, where the Silent Knight has gathered his forces and enough power to take his final form. The epic showdown battle of the year comes in under the wire this December!