Mademoiselle Collignon teaches French and music at a school in the upp er area of Barcelona. Without warning, the administration forces her t o leave the school and move to a new one in the Raval neighbourhood, w ith students of very different nationalities and cultures. Mademoisell e Collignon?s life in this popular neighbourhood will change, presenti ng her with the challenge of involving her students in an ambitious pr oject: the Rainbow Choir.