In 15th century Spain, a conflict has broken out over succession to the throne between Ferdinand, the designated successor, and the Duke of Urgel. Count Luna favors Ferdinand, while Manrico supports the troops of the rebellious Urgel. Both love Leonora, a lady of the court. What the two enemies cannot know is that they are both brothers, because Manrico was stolen by a gypsy woman 15 years ago and raised as her own child.