Yukiko, who moved with her family to Osutanemura, where her husband Hideo's older sister Natsumi lives, had her body defiled by the men of the village under obscene conventions. Yukiko's sense of chastity fades away due to the repeated acts she does every day. Hideo, who had been ignorant of everything, is also frenzied when Natsumi tells him the truth about her Yukiko, but he drowns in the customs. Her surviving son, Shuichi, and the village's only pure daughter, Yuri, also come of age and face this cruel fate...
