A little polar bear Ursa is alone in the cold dark Arctic and looking for his mum. He walks through a blizzard, through the icy cold tundra and sharp ice hummocks, towards the northern lights and the magic song in hope to find his mother. On his way Ursa meets different Arctic animals, friends and enemies, and after many challenges comes to the edge of the earth. In front of him is only the sea and the northern lights. And there in the distance, in the northern lights he sees his mum.