Eighteen-year-old Xin Yuan meets 13-year-old Xu Shanwei by chance, and the two who have lost their loved ones agree to live a good life. Eight years later, 26-year-old Xin Yuan met 21-year-old Xu Shanwei as teacher and student. Love grows quietly. When Xin Yuan decides to love bravely regardless of everything, he discovers that there is more than just a teacher and a student between them. In an accident, the injured Xin Yuan chose to leave, and the disappointed Xu Shanwei left for a foreign country. Reunited four years later, can the two separated by mountains and rivers have a happy ending?