Savage Family follows the lives of a close-knit group of ergaster on a hunt and discovers how they use are their big brains. They are the first ape-men to have our complex understanding of the natural world, and can recognise and follow the footprints left behind by many different animals. They are expert toolmakers and use a highly refined stone hand axe. But the most important things they use are their big brains for understanding others in their group.