Years ago, Shoya Ishida led his peers in tormenting a hearing-impaired classmate, Shoko Nishimiya. When she transfers schools, Shoya finds he has gone from bully to bullied, and is left completely alone. Now Shoya struggles to redeem himself in Shoko´s eyes and to face the classmates who turned on him. He learns sign language to apologise to Shoko for his behaviour, and so begins a relationship that will change his and Shoko´s lives forever.