Regarded as yet another threat to the volatile King Henry VII's claim to the throne, Margaret Pole, cousin to Elizabeth of York (known as the White Princess) and daughter of George, Duke of Clarence, is married off to a steady and kind Lancaster supporter, Sir Richard Pole. For his loyalty, Sir Richard is entrusted with the governorship of Wales, but Margaret's contented daily life is changed forever with the arrival of Arthur, the young Prince of Wales, and his beautiful bride, Katherine of Aragon. Margaret soon becomes a trusted advisor and friend to the honeymooning couple, hiding her own royal connections in service to the Tudors.