On Christmas morning, Ryoko Fujino (Moka Kamishiraishi) finds her classmate Takuya Kashiwagi’s dead body at their snow covered school. The police and the school conclude that Takuya Kashiwagi died by suicide. At that time, an anonymous letter is delivered to Ryoko Fujino. The letter states that Takuya Kashiwagi was murdered by a group of students including Shunji Ooide. The media and SNS begin to question whether Takuya Kashiwagi really died by suicide or was he murdered. The school principal tries to take control of the narrative, but this leads to a more chaotic situation.
Ryoko Fujino is disturbed by people’s reaction to Takuya Kashiwagi’s death. She asks for a trial and an unprecedented school trial begins.