A small polar bear, Ursa, is alone in the cold, dark Arctic, searching for his mother. He braves a fierce blizzard, crosses the frozen tundra, and navigates jagged ice hummocks, following the northern lights and a magical song that fills him with hope. After many trials, he reaches the edge of the earth, where only the vast sea and shimmering northern lights lie ahead. And there, in the distance, glowing within the northern lights, he finally catches sight of his mother!