In the absence of the new prioress, Mother Marie proposes that the nuns take a vow of martyrdom. However, all must agree, or Mother Marie will not insist. A secret vote is held; there is one dissenting voice. Sister Constance declares that she was the dissenter, and that she has changed her mind, so the vow can proceed. Blanche runs away from the convent, and Mother Marie goes to look for her, finding her in her father's library. Her father has been guillotined, and Blanche has been forced to serve her former servants.