The chaos of the Middle Ages swirls around Margaret of Wessex and her family. King Edward of England has cared for Margaret's family since the murder of her father, Edward the Aetheling. Yet King Edward himself is now dying, even as Westminster Abbey—his gift to God and England—is being completed.
With the weight of grief on her shoulders, Margaret tries to ensure that her brother Edgar is elected the king's successor, even while other kings and a certain Norman duke plot to invade England and take its crown.