Introverted 16-year-old Lucia joins her Catholic school's all-girls choir, where she befriends Ana-Maria, a popular and flirty third-year student. But when the choir travels to a countryside convent for a weekend of intensive rehearsals, Lucia’s interest in a dark-eyed restoration worker tests her friendship with Ana-Maria and the other girls. As she navigates unfamiliar surroundings and her budding sexuality, Lucia begins to question her beliefs and values, disrupting the harmony within the choir.