Animated sequel to the Christmas classic from Raymond Briggs. A young boy discovers a hidden box under the floorboards of his bedroom. Inside the box are a variety of items which he uses to make a Snowman and, using some leftover snow, a Snowdog. When his frozen creations magically come to life at the stroke of midnight, he joins them on an amazing arial adventure over London and onwards to the North Pole.

It's Christmas time, and Santa has just finished his worldwide gift deliveries, when an unthinkable tragedy strikes! His most trusted reindeer, Marshmallow, has forgotten an entire planet! Now Santa must travel through space to bring holiday cheer to distant aliens all the while steering clear of his evil brother who intends to stop him from succeeding. Welcome to Big Bad Santa!