They call him Krakatau Dundee, the man who spends much of his working life in remote and hostile deserts, studying volcanic activity. They mystery of Krakatau, the island that all but disappeared from the face of the earth in an explosion 100 years ago has been the centre of his longtime studies. We learn about the man and his work as we follow him and his fellow scientists from their camp on an uninhabited jungle island in Indonesia, to the top of the mountains and the bottom of the sea.