Directed by Takashi Miike, Lesson of the Evil is a twisted psycho thriller based on the bestselling novel by Yusuke Kishi. Hasumi is a popular teacher among students at Shinko Academy, a private high school, and well respected by the faculty and the PTA. However, one of the students Reika feels something menacing lurking beneath his shining reputation. While Hasumi brilliantly solves one problem after another, from a teacher-student sexual harassment to group cheating to bulling, he starts to take control of the school. As the problems go away, Reika is uneasy about the way they are solved. Tsurii, an unpopular teacher at the school, despises the popular Hasumi and starts investigating Hasumi’s past and discovers that Hasumi is a real psycho.