This is the story of two twin princes, one of whom falls in love with portrait of a mysterious princess. He is determined to find her. The other vows to help his brother and they exchange swords. If the blades rust, each will know that the other needs him. Prince Jaromir sets off in search of his princess and, after many dangers and adventures in the Kingdom of the Lion, he finds not one princess, but two. Based on a Czech fairy tale by Karel Jaromir Erben.