In a school called Qinghe Boys' High School, Jing Hao (Ou Hao) and Ah Pi, Tan Jiamu, Yao Ji, and Er Bing formed close friends who shared life and death in a special campus environment. They became the only group in this boys' high school to fight against campus bullying, suppressing the rampant campus evil deeds of Shibata (Kento Hayashi) and others. In the special atmosphere of the times, the two forces maintained a delicate balance until the appearance of the female teacher Liu He (Jing Tian), the balance was broken, and where would the boys in this boys' high school go from here? The fierce battle that unfolded was like an arrow on the string.