Mrs. Megamounds is still stuck at the North Pole, providing all the milk Santa and the elves need! But when Mrs. Claus returns to the workshop, Mrs. Megamounds discovers she's not the only cow at the North Pole to topple titanic milk tanks! And Mrs. Claus isn't happy to see another woman stealing the show from her… looks like this rivalry is going to be settled by a good old milking contest!