The devil and the water sprite, typical Czech characters, play the leading roles in today's fairy tale. They were invited to the castle by Lord Nesvít himself to help him win the hand of Lady Luzmila from the Cloud Kingdom. However, Nesvít is not so much interested in her as in her gold. But Luzmila is cut from the same cloth. And so the devil and the water sprite are there to find out who has a black soul and who needs help. But in the process, their magic causes a lot of confusion...

It is April 1945, spring begins and ends the war. German transport heading away from Bohemia.

Sylvie marries an only child who is strongly emotionally attached to his mother. His mother, Alžběta, cannot imagine losing her son Hynek, a young doctor, or sharing him with his wife. Therefore, she first tries to prevent the marriage, and when she fails, she tries to break up her son's marriage. Sylvia, the daughter-in-law, experiences firsthand the struggle with her mother-in-law over her son and her husband. She naturally wonders whether a man who, at the age of 35, is unable to stand up to his mother deserves a wife or just pity...