Heo Bin is busy with the construction of a hotel in Kyungju. He goes to Seoul on business and discovers the affair of his wife, Seo Yeon, and Hyeong Joon. Heo Bin falls into despair over the betrayal. Returning to Kyungju, Heo Bin is still upset. Then he grows feelings for the beautiful interior designer, Ji Su. Seo Yeon comes to Kyungju 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 Kyungju to meet with her husband. And she asks her husband of the true meaning of sex in a marriage.