Content: Bo, a "thriller" without any ghosts, reveals such a fact. In this film, the only mystery is people. At the beginning of the new semester, the school held an activity week with the theme of "National System". Lena Venger (Jürgen Vogel), a talented and energetic PE teacher, has chosen the course of "Anarchism", but his colleagues beat him to it. He has no choice but to accept the "dictatorship" teaching task. In class, the students showed disdain and agreed that Nazi Germany could not reappear in modern society. Faced with these students who attend classes just to earn credits, he suddenly decided to organize an activity to let the students experience the real dictatorship. Thus, the "wave" was born. The students who were aroused by interest agreed on a unified gesture (red wave on the right), clothing (white shirt) and gesture ("wave", right hand waving on the chest), while Mr. Venger asked the students to call themselves "Mr. Venger" seriously. In class, he made the students stand up and stomp hard, which disturbed the "anarchism" class downstairs. After a short run-in, everyone adapted and fell in love with it. As a result, the excited students either pasted or doodled, making the sign of "tide" appear in every corner of the city overnight. To this end, a particularly enthusiastic student even climbed the roof of a building under construction with his bare hands, regardless of his life, and sprayed a huge sign on the circular roof. The next day, the sign upstairs made headlines. He even defended himself with a pistol, and even sat outside Wenger's house all night defending his leader Venger ... The "Tide" continued to grow, and students even spontaneously occupied a school sports ground, and non-Tide members were not allowed to enter. Gradually, some classmates, as well as the wife of Wenger's master, felt that something was wrong. They advised him to stop this farce immediately, but at this time he was also immersed in a great desire for power and a sense of accomplishment. He once felt inferior because of the great educational gap between himself and his wife, but he felt unprecedented satisfaction in the "wave". Those enlightened students tried their best to stop the activities from continuing, but they were regarded as traitors by their classmates, isolated and even retaliated. Finally, Venger was shocked by his wife's decisive departure and the fighting among the students in a water polo match on the fifth day. So, on the sixth day, he called all the members of "Inspur" to the auditorium and pointed out the horrible things they had done in the past week, with the intention of ending the course. However, it was already late, so the enthusiastic students were disillusioned and had a mental breakdown. He shot and wounded a classmate, and then shot himself. At the end of the film, Venger was taken away by the police, and the awakened students hugged each other and cried. ...