Sir David Attenborough presents an unprecedented documentary series filmed over four years, following five endangered animals and their families: penguins, chimpanzees, lions, painted wolves, and tigers. Each of these animal families faces a fight for survival, under threat from harsh environmental conditions, predators, determined rivals, and the greatest threat of all: humans. Working with renowned scientists, experienced guides and trackers, the crew closely follow the five animals as they struggle to ensure a future for themselves and their dynasties.