In 1384, a poor and illiterate peasant woman named Ermine moved to the city of Reims with her elderly husband. Her era was troubled by war, plague, and schism within the Catholic Church, and Ermine could easily have slipped unobserved through the cracks of history. After the loss of her husband, however, things took a remarkable but frightening turn. For the last ten months of her life, Ermine was tormented by nightly visions of angels and demons...