Heo-bin is busy with the construction of a hotel in Kyung-ju. He goes to Seoul on business and discovers the affair of his wife, Seo-yeon, and Hyeong-jun. Heo-bin falls into despair over the betrayal. Returning to Kyung-ju, Heo-bin is still upset. Then he grows feelings for the beautiful interior designer, Ji-su. Seo-yeon comes to Kyung-ju in search of her husband. She witnesses Heo-bin and Ji-su making love and falls into a deeper despair. Their daughter, Jin, and son, Jun, are hurt by the adulterous actions of their parents. The children feel unstable. Reeling from the shock of a friend's suicide, Seo-yeon returns to Kyung-ju to meet with her husband. And she asks her husband of the true meaning of sex in a marriage.