The holidays gets chilly as Loki and the giant Ymir plot to conquer the world. Marvel heroes Iron Man, Captain America, Hulk, Thor and many others must prevent the villains from stealing Santa's capability -- in case anyone can in fact find the mysterious Mr. Claus. Fortunately, Rocket Raccoon and Groot are hot on the trail of Santa. Heroes, villains, elves and cosmic bounty hunters collide in an epic quest that leaves the world at the balance and also the fate of this vacation.