Hye-jin is tired of the life of being a full-time housewife, so she gets permission from her husband, Jeong-sik, and goes to work at the massage shop of her sister, Ji-hyeon, who lives next door. But with the introduction of his friend, Jeong-sik visits another massage shop owned by Ji-hyeon and ends up having sex with her. Meanwhile, Ji-hyeon’s husband, Ji-seong, is fascinated by Hye-jin’s appearance and visits the massage shop where she works to receive a massage service from her. While doing the massage, both Ji-seong and Hye-jin become excited and also end up having sex. Couple swaps at massage shops!
