In the second instalment of the Stormborn trilogy, the lands of the north bloom as nearly 24-hours of daylight transform the snow-clad landscapes. Summer is intense but short. Two Arctic fox clans struggle to raise their cubs on Iceland's remote volcanic shores. Finding enough food for their cubs proves challenging until one fox learns to hunt new prey. On the shores of Scotland's Shetland Islands, it's time for the otter cub to strike out alone and for his mother to find a new mate, while a lone puffin also searches out a partner. And in the mountains of Norway and Scotland, tiny reindeer calves take their first steps. As the season moves on, orca pods arrive in Shetland to hunt harbour seals, and fledgling seabirds take a leap of faith, plunging hundreds of metres from their cliff-top nesting ledges to the ocean below.