In a row upon row of urban high schools, three groups of Lu Xia, Gu Xingchen, Jiang Moyan and Lin Tong experienced three years of ups and downs on campus together with their classmates. The confusion at the beginning of school, the tension between mid-term and final, the laughter and tears at art festivals and sports meets, secret love and misunderstanding, self-doubt and growth, humor and humor are accompanied by troubles. As high school life drifts apart, their bond with each other becomes deeper and deeper. When the bell rings, everyone must answer for their dreams and youth, and move towards a new stage of life.
