Hyewon was a woman who didn’t talk for years due to unknown reason. But she could listen normally which was different from a mute. She worked as a pianist at backstage for a musical cinema. Oneday, she had an argument with the performer after she helped to play the role of that performer on stage. Then she was fired and jobless. But she found another job as a piano private tutor at a mansion. Her new life as a private tutor wasn’t peaceful as she wanted. It was because of a troublemaker daughter of the mansion who would be her student.