A young couple is transferred from the city to a village in the mountains. The husband, Koichi, is a local revitalization volunteer, and the wife, Ao, is an elementary school teacher. They were supposed to live a rural life, working together with the local residents in the small village. However, in a village with no young women, Ao is looked upon strangely as an outsider. When the village chief's son persistently pressures her for help, the villagers all say in unison, "Keep the blood of the village alive." Before long...