Junior Claus is the only son of Santa and Mrs. Claus. Like many teenagers, Junior is reluctant to take over the family business. Unsure of himself, Junior puts more faith in his technological inventions than in good old-fashioned Christmas magic, much to the chagrin of his father. But, when a sudden drop in Christmas spirit renders Santa incapable of making the great ride, Junior must take the reins. Meanwhile, a scheming, miserly elf takes advantage of Santa';s absence as he plots to turn the workshop into a for-profit enterprise. Together with his overly cheery elf best friend, a gregarious penguin and a host of colorful characters, Junior must learn the true meaning of Christmas in time to save the day.