The film is adapted from the novel of the same name by the German novelist Todd strasser, and tells the story of high school teacher Lai Na Venger leading students to experience fascist dictatorship through classroom experiments.

On the middle school campus of a small town in Germany, a history teacher asked a question in the class of explaining dictatorship: Is dictatorship still possible in contemporary society? The students all sneered at this. Next, the teacher and the students in their class did an experiment to simulate dictatorship. He named the class organization "Tide".

Guide students to set up a unified slogan, a consistent way of greeting and wear the same clothes. In just three days, the students in this class have established a high sense of identity with their own organizations. They are United, excited and radical, and all students who disagree are regarded as heterogeneous. In a group fight with other classes, the history teacher realized the seriousness of the situation.

So the whole class was called to the auditorium to announce the end of the experiment and the organization was dissolved. However, it is too late. An enthusiastic student had a nervous breakdown due to disillusionment of "faith", shot and wounded a classmate, and then shot himself.