Since childhood, Lydia Grechinina discovered a strange property: she heard things that were completely inaccessible to the human ear. The parents dragged the girl to doctors, but were unable to understand the nature of the strange phenomenon. So Lida lived in a world of sounds unheard by ordinary people, and they all simply fascinated her. After graduating from university, the girl got an interesting job, fell in love, and it seemed to her that it was mutual. But in matters of the heart she was not so sensitive, and if not for the tragic incident, Lida would never have heard the music of true love...