The movie revolves around Shoya Ishida, a high school student who was once a bully and is now seeking redemption for his past actions. The story begins with Shoya's elementary school days, where he relentlessly bullied a deaf classmate named Shoko Nishimiya. Shoko's kindness and gentle nature only fueled Shoya's cruelty, and the situation escalated to the point where Shoko transferred to another school.