She is beautiful, she is Catholic, she is the King's sister, her name is Marguerite de Valois. Her brother has nicknamed her Margot. Henri de Navarre is Protestant and said to be ill-mannered, unshaven and to smell garlic and sweat. They are wed by force. It is a political manoeuvre: they need to reconcile the French, torn apart by religious wars. Six days after the marriage at the Notre Dame Cathedral is the Saint Bartholomew day. In the middle of this night of horror, a young man wounded by several sword injuries, frantically knocks on Margot's door; La Môle because he is protestant must die like all the others. Margot hides him, nurses him and grows to love him. That night everything is thrown into confusion.