Sayo Takahashi (Sayoko Machimura) felt a quiet unease in her marriage. Rumors had reached her that her husband was overly obsessed with perfection, having discarded multiple wives in the past. Fearing she might one day be cast aside as well, her life takes a sudden turn when her stepson returns home on parole from prison. Between her and her stepson, an undeniable attraction begins to grow—intense and impossible to ignore. Soon, their emotional tension escalates into a physical relationship. A twisted drama unfolds, tangled with love, guilt, and desire, culminating in a shocking conclusion. Throughout, the film deeply explores the complexities of human relationships and inner emotional conflict.