The next day the courtiers prevent Triboulet from entering the room in which Blanche is with the king. When she emerges she tells her father the whole story, which makes the jester determined to take revenge. As Saint-Vallier is taken to his execution Triboulet replies that the curse will soon act on the king. He goes to Saltabadil at an inn by the Seine and pays half the money for the murder. The king also arrives at the inn, where he waits for Maguelonne, the assassin's sister. When the monarch goes to sleep, Saltabadil plans to deal the fatal blow, but Maguelonne asks him to spare the man who has charmed her and instead to kill a random stranger and give that body to the jester. Blanche overhears and can see that the king is unfaithful but decides to save him by sacrificing herself. She enters and is mortally wounded.