In the Catholic girls' school choir, Celia's voice must not be heard. But her mute acceptance of the conservative dictates of an environment utterly bereft of colour and individuality is soon shaken up by the arrival of a new classmate, Brisa. Standing on the threshold of adolescence, Celia discovers a thirst for life in all its multifaceted glory. A bond quickly develops between the two girls, and together they rail against the authority figures and their rigid rules. In small acts of rebellion, Celia finds the courage to express her growing distrust of the value system governing her world in 1990s Spain, as questions start to form about her own family background – a topic on which her mother has always kept silent.