Twain and Derek fall through the earth's crust and don't emerge for thirty years. On the earth's surface since 2013 the world's social order is in turmoil. Meanwhile Derek and Twain live in another world - they meet the Valley People and marry Pygmy Maltilda and Mitzy. In 2041 the British Army rescue them from the underground. This is their story known as the 'Hutton Phenomenon'.