Bori, an 11-year-old girl in a seaside village, is the only family member who can hear. As an elementary school student, Bori becomes more and more accustomed to talking with her friends while finding it hard to communicate with her family in sign language.

Kim Ah-song
as Bo-ri

Lee Rin-ha
as Jung-woo

Kwak Jin-seok
as Hae-jin

Heo Ji-na
as Mother

Hwang Yoo-rim
as Eun-jeong

Kim Jong-goo
as Grandfather

Kim Ja-young
as Auntie

Choi Dae-sung
as Eun-jeong's Father

Kim Jong-Moon
as Young Teacher

Kim Tae-hyun
as Homeroom Teacher