Christmas is approaching and reindeer Niko is longing to join Santa's Flying Squad - just like his father Prancer. But suddenly the reindeer girl Stella appears and challenges Niko's place. And then, on the day before Christmas, his sleigh is stolen! This is a catastrophe for Niko and the Flying Troop, because Christmas is in danger of being canceled ... Niko immediately sets off in pursuit, accompanied by his brave friends Julius the flying squirrel and Wilma the weasel.