Yixing is a genius composer. He's a well-known prodigy in the music department. But even the greatest talent has its own weakness. For Yixing, it's how he can never find the voice that will give life to his music. A voice that will sing in his mind as he pull note after note in the blank space. Therefore, creating a song he can finally be satisfied with.

He thought he would have to forever feel incomplete with his own work. To match his work with the singer to produce satisfying results. Instead of working his best as the perfect voice molds itself like a perfect puzzle piece. He was about to give up the search. That was until he heard Kim Jongdae.