A very hardworking but also very naive insurance company clerk, Valentin Plavec, becomes the target of endless pranks, jokes and recessions from his colleagues Bejšovec and Voborník. However, their last successful trick somewhat gets out of hand. They add a one to the winning number 8456 and convince Valentin that he has won a million in the lottery. However, since Valentin cannot collect his winnings immediately, he withdraws twenty thousand, which is all the savings he has saved together with his fiancée Helena, and starts shopping for a deposit. However, the truth soon comes out and when his colleagues reveal to him that it was just a joke, they all leave him, only the faithful Helena stays and even helps the unfortunate fiancé cancel all the deposits and agreed deals. When the newspaper reports that there has been a mistake and the winning ticket is number 18456, Valentin decides to take revenge on the two pranksters...

After the Battle of Lipany, the remnants of the Hussite troops concentrated under the leadership of Jan Roháč of Dubé at Sion Castle. However, he had no prospects of victory against the soldiers of the Lordship. Sion was conquered, Roháč of Dubé was captured and executed as a pest in Prague on September 9, 1437.

Jana's beautiful niece arrives in Prague to live with two spinster aunts. Both women wish to marry her off. The son of the court councilor Petr is courting her. However, Jana has met a young official Záviš and the two fall in love. But Záviš is poor and cannot marry yet. They keep it a secret from Jana that he composes songs. Coincidentally, Petr is his friend and both men talk about the girls they love, unaware that in both cases it is Jana...