After a tearful goodbye, Niko leaves his family behind to take his place next to his father on Santas Flying Forces. For Niko, it’s a dream come true: to become a hero, like his father. But Stella, an unknown challenger arrives, to compete for Niko’s spot. Despite their competitiveness, the pair take a liking to each other, and Niko shows Stella where Santas sleigh is hidden. However, on the night before Christmas Eve, Stella steals it. Gutted by her betrayal and desperate to appease his angry father, Niko - accompanied by some old and new friends - heads to the Frozen North to recover the sleigh. As our heroes face grave danger, difficult choices are made that change Christmas forever.