Jun and her husband were under intense pressure from her father-in-law due to their inability to conceive a child. Using this issue as an excuse, the father-in-law, who had long been interested in Jun, begins forcing her into lewd acts. Unable to endure it any longer, Jun secretly obtains an illicit aphrodisiac, gradually spiraling into mental collapse. The father-in-law watches her with growing fascination, indulging in her beautiful body and intimate areas, losing himself completely as he savors her without restraint.