1) A history teacher conducts a classroom experiment called "The Wave" to help students understand the appeal of fascism. 2) The experiment grows increasingly popular as students enjoy the feelings of power, discipline, and unity it provides. 3) However, some students start to take it too far by aggressively targeting those who do not participate. 4) Two concerned students bring this to the teacher's attention, and the principal also complains about incidents of wrongdoing. 5) The teacher then holds an assembly to reveal how the experiment had spiraled out of control and draw parallels to Nazi Germany, apologizing for letting it go too far.