The canine star of a fictional sci-fi/action show that believes his powers are real embarks on a cross country trek to save his co-star from a threat he believes is just as real.
When Santa cancels his annual flight because of a hurt reindeer, a young Christmas loving dog named Olive is convinced she has what it takes to get Santa's flight off the ground and save Christmas.
The story revolves around sub-zero heroes: a woolly mammoth, a saber-toothed tiger, a sloth and a prehistoric combination of a squirrel and rat, known as Scrat.