Travel documentary. Simon Reeve travels the Tropic of Capricorn, the line of latitude that cuts across South Africa, South America and Australia. On the Australian west coast, Simon witnesses the migration of the humpback whale. He meets a tough outback couple refusing to leave an asbestos polluted ghost town and a farmer attempting to eke a living out of a dustbowl. He visits one of many Aboriginal communities in a deperate state, blighted by alcoholism, child abuse and poverty.