In South Africa - where the Indian Ocean meets the Atlantic - there are two strong sea currents: the Agulhus current to the east and the cold Benguela current to the west. The last coral reefs in the Indian Ocean grow in the warm Agulhus current south of Mozambique where turtles and whales gather. The cold Benguela current produces wet winds which move inland in the morning providing the flora and fauna of the region with theirmost important source of water. The film documents an expedition in these unexplored seas and shows how the strong sea currents influence the underwater flora and fauna and also the inland region. This is a scientific adventure of our times.