Aso is a vast caldera - the largest in Japan. There, people live together with an active volcano. They revere and pray to the volcano, which has created such awe-inspiring scenery. Spring, flames engulf the grassy fields of Aso. From the blackened earth, new shoots of green emerge, and are grazed on by cows. The people have passed down the blessings of nature and the wisdom to live with a volcano from generation to generation without interruption. This is the story of a land of fire and water, and of the people who live there.