Separated for sixteen years, the sisters become legends: the younger rises as King Arthur, while the elder becomes a powerful archmage. When the younger suspects the bride at a royal wedding is her lost sister, she wears the old cloak her sister gave her and sets out to find her—only to be mistaken for a beggar. At the wedding, she exposes the groom’s betrayal and dark-magic plot, defeats the arrogant nobles and bullies, protects her sister’s happiness, then returns north to guard the kingdom.