Min Yoongi hated the sound of the piano and the sound of his father constantly yelling at him. But after returning the favor for his roommate, he finds himself drawn to the piano once more and in love with the ghost that is attached to the piano, Kim Chorong. As she lives the life of a ghost, she strives to find how she died and why the sound of the piano is all that can calm her. Together, they will regain something they've once lost and unlock each other's hearts.