Shouya Ishida starts bullying the new girl in class, Shouko Nishimiya, because she is deaf. But as the teasing continues, the rest of the class starts to turn on Shouya for his lack of compassion. When they leave elementary school, Shouko and Shouya do not speak to each other again… until an older, wiser Shouya, tormented by his past behaviour, decides he must see Shouko once more. He wants to atone for his sins, but is it already too late…?

Mizore Yoroizuka and Nozomi Kasaki are two close friends who are part of the Kitauji High School music club. Quiet and reserved Yoroizuka plays the oboe while lively and popular Kasaki plays the flute. The group has decided to play Liz and the Blue Bird, a song inspired on a fairy tale about the relationship between a girl and a bird. The musical piece puts both Mizore and Nozomi on the spotlight due to a solo part by Yoroizuka and forces the two girls to reexamine their friendship.