Although she lives with her husband and her mentally ill father-in-law, they lead a happy married life. However, recently, she has been feeling fed up with her father-in-law constantly giving her lustful looks, but she feels too guilty to tell her husband. Then, her husband goes on a week-long business trip, and she finds herself living alone with her father-in-law. And so begins a nightmare week! He gives her an aphrodisiac during a meal, and she begins to feel strange sensations in her body…