Yi is a promising piano player who dreams to play in the most prestigious musical club in the school, Flashbach. When the founder of the club, a piano prodigy known as Bach, approaches Yi and offers him a chance to audition for the club, Yi believes that his time to shine has come. However, he is soon forced to realise that his method of memorisation is fundamentally flawed. With the time of the audition closing in, Yi must realise, with the help of his friends, that the most challenging part of performance is not in the fingers, but in the mind.