France, 1770. Marianne, a painter, is commissioned to do the wedding portrait of Héloïse, a young woman 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, secretly painting her by firelight at night. As the two women orbit one another, intimacy and attraction grow as they share Héloïse's first moments of freedom. Héloïse's portrait soon becomes a collaborative act of and a testament to their love.