Taeko and her husband, Jirō, are living a peaceful existence with her young son, Keita, when a tragic accident brings the boy's long-lost father, Park, back into her life. To cope with the pain and guilt, Taeko throws herself into helping this deaf and homeless man.

To encourage a positive attitude, hearing-impaired mother Asako joins a theatrical troupe with her daughter Ai. Problems arise during rehearsals between the deaf and the hearing but they learn to work together by overcoming. On the public performance day, two deaf lovers are objected by their parents, which leads to Ai knowing Asako losing hearing when giving birth to Ai, As the curtain rises, Ai is found missing from the back stage…