Yeonwoo, a genius composer known for creating only sad music. With a concert right around the corner and an unfinished composition, not to mention a scandal erupting, he flees to the countryside to focus on his work. While borrowing a piano at his nephew's music academy, he reunites with his first love, who guided him into the world of piano. Yeonwoo, who has always been blunt and rarely smiled, finds himself creating warm and lovely music unlike his previous compositions, all thanks to the cheerful Eunseong. Can their meeting inspire a new, heartwarming melody?!