Better watch out! The big guy in red is coming to town once again. This time, Scott Calvin -- also known as Santa Claus -- finds out there's an obscure clause in his contract requiring him to take on a wife. He has to leave the North Pole to fulfill his obligations, or else he'll be forced to give up his Yuletide gig.

Because she is marrying the man who assumed the mantle of Santa Claus last December 26, Beth's postponed wedding has to be rescheduled for Xmas eve. Overwhelmed by selling the house she and her son share and the prospect of the duties of Mrs. Claus, she has to call on her estranged socialite Grinch of a mother to arrange the wedding. Of course her mom has never met the fiancé nor his family and has no inkling of his secret. This is a sequel to 2004's Single Santa Seeks Mrs. Claus.

Carlo and Giulia are grappling with new problems regarding the division of their respective tasks within the family. Since Giulia has started working again, it is Carlo who takes care of the children and the household chores. However, he starts to find the role of “Mr. Mom” a bit tight-fitting. Just when he decides to get back into the game and look for a job, Giulia reveals to him that she is up for a promotion that would lead her to move to Sweden. As if that weren’t enough, she will have to take the interview on December 24 in Stockholm. Everything seems to threaten the family unity. What should they do? Carlo comes up with a "brilliant" idea… To recover the old camper and drag the family into an adventure that will lead them on a journey to the North to spend Christmas all together lovingly. Unexpected events along the way and a hilarious encounter/confrontation with a self-styled Santa Claus will make the trip unforgettable.