Yan Fei is a middle school Chinese teacher. His fiancée Wen Jing died in a car accident three years ago, and he has been in trouble ever since. The new semester began. In the class of Class 13, Yan Fei met Chen Siyu, a female student who looked very similar to Wen Jing. Later, his love for Wen Jing slowly transferred to Chen Siyu. How will Yan Fei's life change? Should a teacher fall in love with a student who is fifteen years younger than him?