Two young boys, play hooky from school in order to explore an ultramodern world's fair. They take in the many marvelous scientific and industrial exhibits, obtain literature, eat food, and generally run amok.

The drama offers Arnošt Pánek, chairman of the National Committee, as the protagonist of the story. Pánek is disturbed by news of the arrest of his protégé Kvasil – chairman of a JZD agricultural cooperative in the nearby village of Spádová. He is responsible for the revival of a neglected village, but is now accused of theft, fraud, and – on top of that – the rape of an under-aged girl.

Oldrich is the runt of his village, beaten by his father, bullied by the other boys. But he has imagination on his side, and a wiry toughness they can’t defeat. The village is in turmoil, because the Nazi occupiers have just retreated and the Red Army is advancing. Oldrich dodges amid the mayhem and panic, taking his share of blows but always managing to stay one step ahead.

A twelve-year-old boy knows that adults often lie—and this realization causes him no end of trouble. When he stumbles upon the suspicious death of an old man, he begins to weave a web of suspicion.