A nature documentary series on five vulnerable or endangered species known to form enduring populations: chimpanzee, emperor penguin, lion, tiger and African wild dog.

Follow the true stories of five of the world's most celebrated, yet endangered animals; penguins, chimpanzees, lions, painted wolves and tigers. Each in a heroic struggle against rivals and against the forces of nature, these families fight for their own survival and for the future of their dynasties.