At Machida High School, a private Morninglight College, group cheating is serious, and campus violence has triggered a chain of clashes between messing parents and teachers. The misbehavior of physical education teacher Tetsuro Shibata (Takeshi Yamada) and art teacher Kumi Gangyi (Hirayukita) humiliated this sacred profession. In this disorderly chaos, Grade 4 class teacher Lian Shiji (Yingming Ito) continues his perfect and pure teacher myth. Elegant, modest and amiable, beneath the appearance of an angel is a cold devil's heart. He devoted himself to business, laying one imperceptible trap after another, quietly erasing those who threatened his existence. Physics teacher Diaojing (blown full) secretly investigates Lianshi's past and background, and tries to expose the true face of Lianshi with his students Guisuke (dye Valley will be acted the role of too), which all leads to a series of bloody killings. There was a river of blood on the eve of the joyous campus festival. This film is adapted from the original work of the same name by the writer Guizhi Sukeuke.