Elementary school student Shouya Ishida feels uneasy when Shouko Nishimiya, a timid girl born with hearing impairment, transfers into his class. After her arrival, Shouya and his friends start tormenting Shouko, making her the helpless target of ridicule and assault. The relentless bullying turns school into a living hell for Shouko, where even the teachers remain indifferent to the situation. Koe no Katachi tells the heartbreaking story of Shouko falling victim to bullying, but also one of hope, remorse, and redemption.