A story of three animal families on a journey across our planet - polar bears, elephants, and humpback whales. It captures rare footage of nature's wildest and most elusive animals.

Every year, millions of animals embark on epic journeys on an astonishing scale, crossing hostile landscapes, traveling hundreds of miles, overcoming fearsome obstacles, and facing intense dangers in a race to reach their destination. Follow caribou, elephants, and zebra on breathtaking wildlife adventures, journeying across hundreds of miles of Canadian arctic wilderness and African bush.

Each season, as the ever-thinning Arctic ice recedes, polar bears face a daunting challenge; Grizzly bears in British Columbia must use ingenuity and fancy footwork to collect their catch; The annual rains of the Serengeti draw in the greatest concentration of large animals on Earth; Each year, billions of sardines flood South Africa's east coast creating an action-packed feeding frenzy; Thousands of animals make the long trek toward the life saving...