Between February and July 1858, in the Massabielle cave, the Virgin appeared eighteen times to Bernadette Soubirous, a miserable little girl from Lourdes. A true revolution in the heart of the Second Empire that shakes the established order by his universal message of love and prayer.

Aurélie and Célia are friends studying at the École des Beaux-Arts. One day Aurélie falls for the charms of Olivier, a handsome architecture student. Célia warns her friend of Olivier's bad reputation with women, but Aurélie lies to her, saying that she's not interested in him and doesn't mention that she has agreed to go on a date with him.