Let's venture into the dark forests, where a father and his son Petr are wandering. They are returning from the city, where they earn extra money by playing music. This time, however, they cannot find their way home. Their only salvation is a light that appears in the distance. It leads them to a strange castle that has never stood there before. They have no idea that it is inhabited by a sorcerer who will intervene in Petr's life. In the years to come, Petr will serve the sorcerer, learn the value of friendship, and discover the love of a beautiful princess. However, in order to win her, he must free himself from the sorcerer's power...