A single Arctic fox scurries across the mountains. He’s on a mission to reunite with his mate from last year, but has she survived the harsh Icelandic winter? All he can do is wait. In Shetland, a mother otter has successfully raised her twin cubs, one male, one female, to the brink of independence, but their journey will be far from easy - a dog otter is hanging around and determined to cause trouble. A huge March storm rages across all the Stormborn lands, disrupting the foxes' mating and reindeers' journey. But the otter family is the most keenly affected. Separated from the rest of her family, the female cub becomes isolated and afraid.