Magnolia.

King Černomysl has four daughters and one son, who is just celebrating his 17th birthday. The king intends to find him a bride, but the prince has fallen in love with the miller's daughter Rózinka. The king holds a ball, the jester brings him a new assistant, the miller's daughter in disguise. Meanwhile, the prince looks for Rózinka at her home, but the miller tells him that she has disappeared.