Travel documentary. Following Equator, Simon Reeve embarks on a journey on the Tropic of Capricorn, the line of latitude which cuts through Southern Africa, Australia and South America. The first leg sees Simon crossing the beautiful landscapes of Namibia and Botswana. He has a close encounter with some hungry cheetahs and visits the world's largest diamond mine. He crosses the Kalahari Desert in search of the famous Bushmen, who claim they have been evicted from their ancient homelands.