It is Spring 1282, and England is at war again with Wales. Baron Hugh of Wynethorpe is preparing to join the King's army, and asks his sister, Prioress Eleanor of Tyndal Prior in Norfolk, for a favor. He needs her to deliver a letter to Prioress Amicia at the Mynchen Buckland Priory. When Eleanor, Brother Thomas, and Sister Anne arrive, they discover Amicia imprisoned for murder. In an unfamiliar place, the murder victim buried, and nothing left at the crime site, what can the Tyndal trio unearth?