The story takes place on the eve of the bursting of the bubble economy, and White Christmas is coming quietly. The body of a student was found in the flawless snow of Chengdong No. 3 Middle School in the early morning. The deceased's name is Bai Muzhuo (Wang Yuebu is acted the role of), is the student of the second class of three years. His death made the new head teacher (Blackwood Hua acted the role of) sad and flustered, while the school felt unprecedented pressure. After the inspection of the scene by the police, it was determined that the cypress wood died of suicide. Originally, the incident was attributed to silence, but several notices and letters aroused new waves. The letter said that Cypress was bullied by his classmate Shunji Shimizu (Shimizu), Yutaro Hashita (Kato), and Iguchi (Shintai Ishikawa), and was eventually killed by three people. Since then, the media have repeatedly maliciously interpreted, parents are excited, so that the school is no longer calm. As a monitor, Ryoko Fujino (Ryoko Fujino) can no longer stand it, so she decides to organize a court in the school to track down the truth of Cypress's suicide. This film is based on the classic masterpiece of the best-selling reasoning writer Miyagi Miyuki.