1760年法国布列塔尼,才华洋溢的年轻女画家玛莉安(诺米·梅兰特饰)收到委托,需要在对方不知情的状况下,完成富家小姐艾洛伊兹(阿黛拉·哈内尔饰)出嫁前的肖像画。两人在孤岛相依为命,白天女画家悄悄观察小姐的一举一动,到了晚上才纵情下笔。两人在画与被画的亲密接触下,即便是在充满礼教束缚的时代,却也渐渐萌发了禁忌的暧昧情愫,随着大婚之日越来越近,她们的爱火却越烧越猛烈…In 18th century France a young painter, Marianne, is commissioned to do the wedding portrait of Héloïse without her knowing. Therefore, Marianne must observe her model by day to paint her portrait at night. Day by day, the two women become closer as they share Héloïse's last moments of freedom before the impending wedding.