Secret: Untold Melody

Yu-jun, a promising pianist, suffers a wrist injury that ends his career. Returning to Korea for treatment, he enrolls at his father's music college, where he encounters Jung-a, a mysterious girl playing a haunting melody.

As their bond deepens, Jung-a remains distant, hiding a secret. When she vanishes without a trace, Yu-jun embarks on a journey to uncover the truth behind her enigmatic past.