Yu Zhouzhou lives with her mother. On the first day of elementary school, Yu Zhouzhou met a boy named Lin Yang because of a fall. With the help of Lin Yang, she overcame the initial discomfort with school, and the two became good friends. However, because of some rumors, Lin Yang was asked by his parents to stay away from Yu Zhouzhou. Yu Zhouzhou learned to pretend not to care about Lin Yang's estrangement. In junior high school, Yu Zhouzhou escaped from Lin Yang and his former classmates, gradually letting go of her hands and feet like a duck in water, and finally got into the provincial key Zhenhua High School as she wished. The reunion with Lin Yang in Zhenhua was not sure whether it was sad or happy. Because of a coincidental call from Lin Yang, Yu Zhouzhou's fate was changed again. Lin Yang's guilt, eagerness to make up, and unclear feelings made Yu Zhouzhou not know how to deal with it. As for the care for her older brother Chen An, the fierce competition for the recommended places in the key high school and the death of her good friend Mi Qiao. Yu Zhouzhou has always used a sunny, kind and enterprising heart to face the changes around her and grow rapidly. After graduating from high school, the song ends and people disperse, but youth is immortal.