Seohyun was once an outgoing, bubbly girl who had a great passion for singing, but when her single mother suddenly passes away, Seohyun becomes introverted and cannot no longer express love. Her aunt worries for her and decides it is best to transfer her niece to the music school her husband, Seohyun's uncle, is a teacher at. There, Seohyun attracts much attention as a new student and time passes while she is known as the "loner girl". However, when she encounters the music school's prodigy, Jung Yonghwa, she starts to feel the same warmness she shared with her dear mother.