Charlotte Uhlenbroek encounters an 80-strong troop of wild baboons in the Mikumi National Park in Tanzania and learns about their habits and the organisation of their societies. She tries to understand the way they live by spending a whole day as one of the pack, a task that involves walking along plains under scorching heat in search of food. Over the next 10 days, Charlotte infiltrates their society, discovering an anarchic world of sex, politics and power-struggles.