Ji-pil was an unknown songwriter, but his girlfriend, Yoon-hee, always loved and supported him. When he got successful, however, he chose to leave her. Shocked and devastated, Youn-hee traveled to Vietnam, where she always wanted to go, and killed herself. Learning about her death, Ji-pil falls into a slump. One day he listens to a great piano song on Youtube, but the performer, Mi, refuses his offer to sell the song. After crashing with his agent, Ji-pil gets on a plane to go to Vietnam and meets Mi, by accident, as his tour guide. Mi says that even though she played the song, the song seems to belong to the previous owner of her old piano.