Violette and Thomas are in France for Camden's coronation into French nobility. Married for seventeen years, their happiness is threatened by the arrival of a suspicious letter from the past, which threatens to destroy their love and marriage. Mary, queen of Scots, seeks refuge in England, hoping that Queen Elizabeth will restore her to the Scottish throne. Instead, Mary finds herself Queen Elizabeth's prisoner. She is entangled in a murderous plot to assassinate Queen Elizabeth. Mary's life hangs by a thread.