Henry VIII, locked in a political showdown with France, offers up his beautiful sister, Princess Mary Rose, to secure peace between the two mighty kingdoms. Teenage Mary becomes the wife of the elderly King Louis, but remains secretly in love with Charles Brandon, the Duke of Suffolk. When King Louis dies two years later, Mary must act quickly to be with the man she loves. Mary and Charles devise a scheme to outwit the king, not knowing if it will lead to marital bliss or certain death.