Lesson of the Evil is a Japanese horror-thriller film directed by Takashi Miike. The movie follows Seiji Hasumi, a popular high school teacher who seems to have a perfect life, but behind his facade lies a disturbing darkness. Seiji observes the bad behavior and bullying amongst the student body and decides to take matters into his own hands. He concocts an extreme plan to rid the school of its worst elements, using his extraordinary intelligence and charming persona to cover up his true intentions.
The plan involves making weapons and using them to kill bullies and other trouble-makers on campus. Seiji becomes a master manipulator, using his popularity to get away with murder and instilling fear in his students. Things escalate quickly as Seiji's behavior becomes more erratic and violent. The once-idyllic school becomes a horrifying place as students fear for their lives.
As the body count rises, Seiji's true self is revealed, and it becomes clear that he is not the hero he pretends to be. The movie ends in a shocking, bloody finale that leaves the viewer questioning morality and the consequences of unchecked power.
Overall, Lesson of the Evil is a chilling and thought-provoking film that explores the darkness that can lurk beneath the surface of seemingly perfect people. It delves into the consequences of unchecked authority and the lengths that some people will go to in the name of their beliefs.