When Su Mu, a dubbing actor with "variety of voices", meets Qi Yu, an ear specialist with "absolute sense of pitch", a collision about sound and soul begins. In order to save her father who suffered from a rare ear disease, Su Mu used his voice as a bargaining chip to reach a deal with a cold and harsh genius doctor. Little did he know that his voice had already become the salvation that Qi Yu had been searching for for ten years.
