This adventure family drama is based on the story of Kazuhiko Inoue, who quit his job as a salesman at a trading company and moved his family to Tonga, known as "The Last Paradise".

On a beautiful island in Seto Inner Sea, Seichi and Minko make their living by transporting rocks to construction sites by boat. They cherish the deepest affection for this piece of land they call home, and the simple life they lead. But rapid industrial growth makes it all but impossible to continue their chosen living style, and they are forced to leave their beloved hometown in search of a brighter future. But their hometown lingers on their hearts, and they dream of a time when they may once again return.