In a lonely palace lives Prince Azor who has been transformed by a vengeful fairy into a beastlike form. When a foreign merchant disturbs the palace peace, the creature-occupant demands a human sacrifice as punishment. Zemira, the merchant’s daughter, is ready to give her life but soon discovers Azor's beastly form hides an altogether different soul. Will love save the day?

The Rhine maidens lure and mock the dwarf Alberich. He curses love and steals the Rhinegold.