Due to her husband's failing business, wife Miyuki has moved back into her in-laws' home. Struggling with the tight living conditions and growing exhaustion, she desperately tries to maintain her relationship with her husband. Meanwhile, her father-in-law Toshiharu, a wealthy man whose strong libido remains undiminished with age, becomes increasingly obsessed with Miyuki's beauty. Desiring her as his own, he longs to make her submit to him. However, Miyuki resists his advances, forcing Toshiharu to endure his frustration while plotting a way to bring her under his control. Eventually, he puts his plan into action. Drawn in by his manipulative words, Miyuki gradually loses her sense of self, growing accustomed to his dominance. In the end, her body falls completely into Toshiharu's hands, giving rise to a new, forbidden relationship.