Simone Beaulieu runs a convent school for girls in the 1960s. She has turned the little convent into a musical treasure where the students have won every prestigious music competition in the region. When her talented but rebellious niece joins the convent and the government threatens to shut down the school in favour of public education, her world is suddenly turned upside down. Can she accept her past in order to move forward? Or will she perish with tradition?