Rinette Leslie of Granmuir has the ancient gift of divining the future in flowers, but her gift cannot prepare her for the turmoil that comes when the dying queen regent entrusts her with a casket full of Scotland's darkest secrets. On the very day she means to deliver it to newly crowned Mary, Queen of Scots, Rinette's husband is brutally assassinated.

Devastated, Rinette demands justice before she will surrender the casket, but she is surrounded by ruthless men who will do anything to possess it. In the end, the flowers are all she can trust-and only the flowers will lead her safely home to Granmuir.