In a small convent school in rural Quebec, Simone Beaulieu, better known as Mother Augustine, runs a convent for girls in the 1960s. There the convent provides a musical education to young women no matter what their socio-economic background. 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 with the looming changes brought by Vatican II and Quebec’s Quiet Revolution, the school’s future is at peril, and her world is suddenly turned upside down.
She and her fellow nuns are forced to confront the waves of modernity and Mother Augustine herself must search her soul for a new calling. Can she accept her past in order to move forward? Or will she perish with tradition?