Xie Yutang, a cold-blooded and iron-fisted female CEO, has raised her son Xie Zixuan, who suffers from severe selective mutism, by herself for six years. After exhausting countless medical resources to no avail and ex-husband Shen Jingxing trying to regain custody, a mysterious and cold young violin teacher Liang Luochen broke into their lives. Not only did he use music to open the children's closed hearts, but he also revealed the forgotten truth about that rainy night six years ago - he was not an expert who appeared by chance, but the only "stranger" who witnessed the most helpless moment of mother and son and has been guarding them silently to this day. This is a long healing in the name of love, and it is also the reunion of two lonely souls after a long separation.
