Only the strong survive at the top of the world. Stalk the Arctic ice with its fiercest predator, the polar bear, as it prowls one of the most forbidding places on the planet - a hidden kingdom of magnificent creatures. Armed with a keen sense of smell and backed up by 800 kilos of fur and fangs, the polar bear stands alone at the top of the food chain. Yet many other hunters manage to survive in and around harsh Arctic waters from the savvy arctic fox to the massive, whiskered walrus. The Arctic ice is revealed as a place of danger and drama where animals are stranded on frozen waters, trapped between moving sheets of ice, and caught in the struggle to survive.