In the fifteenth-century kingdom of Brittany, seventeen-year-old Ismae escapes from the brutality of an arranged marriage into the sanctuary of the convent of St. Mortain, where she learns that the god of Death has blessed her with dangerous gifts--and a violent destiny.

When Sybella discovers there is another trained assassin from St. Mortain's convent deep undercover in the French court, she must use every skill in her arsenal to navigate the deadly royal politics and find her sister-in-arms before her time--and that of the newly crowned queen--runs out.