Daniela, the glassmaker’s daughter, is grumpy and never smiles. Her father promises a beautiful glass palace to anyone who can make her laugh. People come from far and wide to try their luck in amusing Daniela. But mask makers, lion tamers and magicians cannot raise a smile from the princess. It is only when a young apprentice makes the first looking glass that Daniela learns to smile - at her own grumpy reflection! The glass palace splinters to smithereens from the sound of Daniela’s laughter, and the whole of Venice rejoices.