Dong Joo (Park Ha Sun), who is tone-deaf, has a crush on a man and attempts to improve as a singer to become closer to him. Shing Heung (Yoon Sang Hyun), an instructor at a tone deaf clinic, by chance helps Dong Joo and begins to like her. Meanwhile, Bo Ra (Lim Jung Eun) is a friend of Dong Joo who also tries to helps Dong Joo.