The year is 1946 and the story takes us to a great bar among the characters of Prague's gallery. A professional conman, commonly known as "The Engineer", makes a bet with pickpocket Franz that he will sell Karlštejn Castle to a rich American who is currently in Prague...
A girl from a dance ensemble from Uherské Hradiště and an amateur jazz musician from Strakonice will meet at the II. National Spartakiada. Life under victorious socialism is presented as a permanent folk festival with mass gymnastic performances, dance and music. The film was said to have been very popular in Cuba at the time.
