Ji-hyun, a drama writer, meets Gang-uk, a plstic surgeon, during her trip to Thailand. They fall in love with each other at first sight and have an affair where no one knows who they are. At the hotel, Gang-uk opens his heart to Ji-hyun, and they become intimate with each other. They enjoy the trip at a beach and express their feelings, not knowing even each other’s name.
Ji-hyun has a fiancé, Jong-hyuk, who is a promising fund manager and a successor of a plutocracy. Gang-uk also has a sweetheart, Min-jeong, a dermatologist. Although Ji-hyun and Gang-uk have already been engaged to someone else, they cannot help but stop loving and longing for each other.