Let's take a look into little Martin's room. His mother tells his sons that they will have a new father, and Martin has a fairy-tale dream at night about a kingdom threatened by an evil dragon. Fortunately, clever Martin is there, who has fairy tales literally in his little finger. He advises the king on how to kill the dragon - it would take Honza...
The cheerful fairy tale takes us to the first category of hell, inhabited by mischievous devils, and the second category of hell with dirty devils. And this is where the village youth Kája Fousek falls as punishment for his arrogance... The devils decide to correct him. But one of them falls in love with Kája, and he falls in love with her.
