The old man, regardless of age, develops a strong interest in his son's wife and begins negotiating to make her his own. Swept away by his unsettling passion, the daughter-in-law eventually surrenders her body. Naturally, she keeps this a secret from her husband. The son, burdened with such twisted parents, becomes a figure impossible not to pity. Through obsessive, relentless stimulation, the old man gradually heightens the wife's sensitivity, repeatedly driving her to the peak of pleasure.