The main cast is Mr.Hideki Matsumoto who lives in a slum as a manual worker, 60years old. The place where he usually lives is 500yen per night. He is an environmental activist and speaker who has given around 2000 lectures at universities and various venues around the world. He started traveling all over Japan and around the world as a child. He has traveled to 135 countries and circled 6 times around the world by bicycle. He was the former owner-president of a big construction company with $30 million in sales. And he built nuclear power plants and was a member of the nuclear power plants construction promotion group. But he suddenly resigned from all of that. Because that big earthquake occurred in Japan at that time.