Stone walls are part of the fabric of traditional Japanese scenery, especially in mountainous Shikoku in western Japan. Walls delineate fields, protect homes and support a rural way of life. But today, the expertise needed to maintain and repair them is in danger of dying out. In college, Reo Kaneko, now 30, was charmed by the walls’ functionality and simple elegance. He took on the challenge of learning traditional wall-building techniques and passing them on to the next generation. Quitting his job and moving to Tokushima, he set about making his living solely by repairing broken walls and teaching others how to do it. However, the realities of marriage and a child are causing financial strain. He remains committed to living and working in rural Shikoku, while his wife works for a construction company in Tokyo. Can he find a way to build both walls and a family life?