Mi Ju, a part-time music professor, gave up her career as a cellist after a car accident killed her rival and best friend, Tae Yeon. Now distant from her family, Mi Ju’s life spirals when a student threatens her over a bad grade, and she receives a mysterious cassette with a haunting cello duet that stirs painful memories. Her mute, mentally disabled daughter grows fond of a cello, prompting Mi Ju to
