In the year 1464, while England recovers from the devastation of the War of the Roses, Baron Alexander FitzRoland is dying in his northern castle. His young wife, Rosalynde, recovering from the stillbirth of her first child, succumbs to despair like a dutiful lady should. When the castle gates are threatened, only Alexander's reputation as a brutal fighter is enough to frighten off their opportunistic enemy. The proper thing for Lady Rosalynde to do is to pray and submit to devastation. Instead, she puts on her husband's armor and rides to the gate disguised as the baron. From there, things only get more complicated. Between mastering the art of war, meeting with witches, struggling with self-doubt and maneuvering her complicated relationship with Alexander's lover, Robert, Lady Rosalynde balances on the razor thin line between duty and destiny.