On the shores of Canada's Hudson Bay, a unique community of polar bears dominate the frozen wilderness. Every year hunger drives these bears to take on an epic journey that follows the freezing and melting of the sea ice as they go in search of their prey of choice, seals.

In the southern plains of Africa's Serengeti, a notorious brotherhood of cheetahs – Luka and Kovu – hold their hard-fought territory. But when a raging bushfire destroys their prized hunting ground and drives them into exile, they must draw on all their cunning and camaraderie to survive and secure a new home

In the Okavango Delta, young lioness Nikki is experiencing the pain of loss. Her tiny cubs, less than 3-months-old, are gone, most likely killed by a passing leopard. But there's no time to grieve. The Matata Pride hold one of the most desirable territories in the area. But it comes at a cost.

In the remote and northern reaches of Zimbabwe, an African wild dog puppy, Ghost, is born into a family of wild dogs. Her mother is Violet, the dominant female within this pack. Despite being an exceptional huntress, Violet is still young and inexperienced, and most of her previous litters haven't survived. Now is the time for her to learn from her previous mistakes.

In the remote mountains of Patagonia, in South America, puma numbers are booming and Rupestre, an adult female, has just six months to teach her four cubs everything they need to survive as their world becomes increasingly competitive. As the two cubs grow stronger and wiser, Rupestre is faced with making a difficult decision. When will they be ready to face adulthood alone?