A poor household consisting of a mother and her son. The mother has become the mistress of her late husband's friend, Kawahara, to earn money for their living expenses. However, the son secretly harbors deep feelings for his mother. Because of this, he begins to feel intense hatred and jealousy toward his mother's lover. His pure love for her becomes distorted, driving him to possess her as "his alone." The mother, too, gradually succumbs to her son's obsessive desire, and a quiet, twisted affection between mother and son starts to bloom. Love, jealousy, and a warped familial bond slowly grow deeper.