In Nazi-occupied Czechoslovakia, a doctor-turned-warehouse employee reluctantly agrees to treat a gravely wounded political fugitive, putting himself and everyone living in his building complex in danger.
Two marriageable girls, Princess Disperanda and her maid Káča, sign a betrothal with their own blood in exchange for fairy-tale grooms. Although both devilish betrothals accidentally fall into the hands of the brave retired soldier Martin Kabát, the cunning devil Solfernus takes possession of them through cunning, and Martin has no choice but to go to the burning hell.
The nine-year-old Prague boy Pepiček flies to Moscow as an involuntary stowaway on an airplane. Together with the Soviet pioneer Mischa, he pursues an alleged agent in the hustle and bustle of the World Festival and is flown back to Prague in the evening.
