Child murderer released on parole, Beranger Guy is welcomed by the monks of the Abbey of Vielsart, a quiet little village of the Ardennes. It is under the protection of Chloe Muller, a young inspector of the federal police, convinced that sooner or later the former criminal will reoffend. While the population is worried by the presence of the number one public enemy in their neighborhood, police learn the disappearance of a girl in the village ...