This story uses music to depict a child's emotional and physical recovery. Sunwook, who believes that happiness can only come from excelling in music, encounters a group of "free-style musicians" who simply enjoy playing. These grandmothers ignore sheet music, play offbeat, and disregard formalities, yet their rhythm exudes a sense of freedom that ultimately helps Sunwook's halted melody flow once again. The journey of music not only leads to his recovery but also awakens Saebyeol’s body and Jinjoo’s heart, offering a joyful path to the liberation of both body and mind through music.