When Baron Herbert returns from crusade he grows increasingly morose and withdraws from his family. When his sons begin to die in strange accidents, questions are asked whether Herbert harbors a dark sin for which God has cursed him. The baron suddenly sends for Sir Hugh of Wynethorpe, begging his friend to bring spiritual and secular healers. Sir Hugh persuades his sister, Prioress Eleanor of Tyndal Priory, as well as a respected physician, Master...