The trailer for Seo Yoo-min's Secret Untold Melody.
Yoo-Joon (Do Kyung-Soo) is a talented young pianist who suffered an injury and has lost his passion. After transferring to a new school, he hears the playing of a piano and follows the music. He traces it to the practice room where he discovers a girl named Jeong-Ah (Won Jin-Ah) playing mysterious music. Soon, the pair develop feelings for each other but Jeong-Ah repeatedly pulls away. One day, she suddenly disappears and as he searches for her, Yoo-Joon discovers her secret…
