Shen Nianxi, an eighteen-year-old freshman in the music department, unexpectedly strikes a chord with Gu Tingfeng, the campus heartthrob who suffers from emotional detachment, when she improvises an accompaniment at the opening ceremony. He approaches her under the pretext of a “treatment contract,” but as they spend time together, he falls for her. From a campus confession to opposition from his wealthy family, from online harassment to separation abroad, from fighting side by side to a wedding crisis, they weather four years of hardships, heal each other through music, and face the world together with their love, finally promising to spend their lives together at graduation. This is a story of “mutual salvation”: she teaches him what it means to fall in love, and he gives her the courage to soar.