On a night with a full moon and a storm, Laure, still a child, is awakened by the tears of a young woman who has entered her room. At first intrigued, the child approaches the stranger then snuggles into her arms. Suddenly, a scream tears through the night. The housekeeper rushes into Laure's room, collapsed. The strange creature has fainted while drops of blood flow down the child's neck... The years have passed. One autumn evening, a group of travelers whose sedan was in an accident entrusted to the baron, Laure's father, a strangely beautiful young girl. Her name is Carmilla...

1730: shortly after the revocation of the Edict of Nantes, women refusing to abjure Protestantism are imprisoned in the Tower of Constance. Among them, Marie Durand, who would later become an icon of the Huguenots. All these women consumed by loneliness, illness and fear cling to only one idea: to resist.