A family reorganization at the age of thirteen turned Xu Rouyan and Su Kangcan, who was four years older than her, into unrelated siblings. While conflicts arose due to mismatched relationships, the two young hearts gradually got closer. The two experienced the most unforgettable love at their most beautiful age.
However, Xu Rouyan's father, Xu Feng, accidentally died in the line of duty during an arrest operation. Various signs indicate that police officer Su Kangcan in the same group fired a fatal shot at him...