Young reindeer boy Niko secretly wishes his mom and his hero dad from world famous Santa´s Flying Forces would get back together and they could be a real family, which they never have been. One day mom tells Niko surprise news: she has met a guy, an ordinary reindeer called Lenni, and he and his little son Jonni will move in. Niko´s world is shaken: he will not be the only child anymore, and he has to live together and look after this little cutie cute step-brother – with not so good results…