In mid-seventh-century Ireland, Sister Fidelma of Cashel-sister to the King of Muman, an advocate of Brehon Courts, and religieuse of the Celtic Church-returns hastily from a pilgrimage to the Shrine of St. James. The news that brings her back is that her companion and friend, the Saxon monk Brother Eadulf, is under arrest for a serious crime in the neighboring kingdom of Laigin. Riding furiously through hostile territory, she arrives only to find...