Seo-jun, a young pianist from an underprivileged background, manages to study classical piano with the aid of a scholarship with the help of renowned pianist Eun-jung Son. His goal is to win an international competition but he is repeatedly defeated by his rival, Min-jae. After failing to win, out of frustration, he vandalizes in the waiting room. Ji-soo witnesses his misdemeanor and blackmails him to manipulate him. Seo-jun and Jisoo develop a romantic relationship and he finds out that she plays jazz piano. He became passionate about jazz piano as weLL, performing in jazz clubs, and distracted from classical piano. Eun-jung discovers his behavior and disapproves of it, and thus considers cutting the scholarship off him. Seo-jun gets one last chance to compete in a competition before his military enlistment but learns that Min-jae is also participating. Can Seo-jun prove his worth and forge his path as a pianist?