Brittany, France, 1760. Marianne, a painter, is commissioned to do the wedding portrait of Héloïse, a young lady who has just left the convent. Héloïse is a reluctant bride to be and Marianne must paint her without her knowing. She observes her by day and secretly paints her at night. Intimacy and attraction grow between the two women as they share Héloïse’s first and last moments of freedom, all whilst Marianne paints the portrait that will end it all.