On Christmas Eve, toy salesman Scott Calvin accidentally knocks a strange old man off his roof. To his amazement, he discovers a reindeer parked nearby.
While the stranger flails helplessly in the snow, a curious Scott hops into the sleigh and finds himself at the North Pole, where the head elf convinces him to take Santa Claus’s place — the very Santa currently lying outside Calvin’s house, unable to perform his duties.
Scott agrees, but putting on the costume and dancing with kids is one thing — actually becoming Santa is another, especially when your beard grows, your belly expands, and your hair turns white before your eyes. He’s never had a Christmas this fun before...