Grandpa Chernoprsk and his grandson Trdlík are mistaken, the little devil accidentally pressed the Happy Tomorrow button and appears on the ground two hundred years earlier. They are reprimanded by the boss of hell for that, but Chernoprsk still ends up calling the hello to Hell. He settles in a forest mansion, where the old devil is to teach Trdlík devilish skills and punish various human iniquities. In the chateau, they meet a little curious little girl, Rozárka, who is in the woods with her parents on mushrooms. In the first seven incidents, all three correct the scandals of both children and adults as they destroy nature, cheat, exaggerate, lie or steal. Don't worry, everything will always turn out well, we are in fairy tales.
