A young woman journeys to a distant castle on the back of a great white bear who is the victim of a cruel enchantment.

Finland, 1910: Fifteen-year-old Sig is shocked to see a hole in the frozen lake outside his family's cabin and to find his father's corpse nearby. Why did Einar steer his dog sled across the lake instead of taking the safer land route? Sig's sister and stepmother go for help, leaving Sig alone with Einar's body in the cabin. Soon after, an armed stranger barges in, demanding a share of Einar's stolen gold.