Two men are brutally murdered by strangers in an alley in medieval London on a cold night in November 1275. A royal nuncio, Simon Lowys, is sent to discover how the murders are connected to a coven of witches, the Daughters of the Shadows. As he pursues the coven, a mysterious woman with long red hair and piercing dark eyes appears at his every turn. Simon uncovers a conspiracy linked to the assassination of King Edward I's cousin five years...