Władysław is declared a hero after controlling panic in a bank archive fire.

Darkness hides secrets - twelve-year-old Marta finds out about it in the last days of summer vacation. During one of his lonely night escapades in the countryside, he witnesses a brutal rape. The resolute girl does not dare to tell her mother about the event, who is also hiding an important secret.

Ewa decides to end her romance with Alek. From the mountain guesthouse they go by car to Warsaw. . . Kim, after being released early from prison, returns to his wife, Jola, who lives in a lonely house. Here he finds a man who claims he has been hired for hard work. Kim wants to find out if Mietek is not Jola's lover.

New cooling towers are to be built for the power station in the small village of Zaspenhain. The work is being carried out by builders from Poland, including Jerzy. Gitta, a young woman from Zaspenhain, works at the power station as a laboratory assistant. When the Polish construction workers arrive, she falls in love with Jerzy. But then the past intervenes...

The main character of the film is a little boy named Marek, who from an enemy of nature becomes its devoted friend. Before this happens, however, fate plays quite a trick on him. At first, however, nothing foreshadows this. Marek arrives in the forest with a school trip. He quickly separates himself from the rest of the children, after which he gives vent to his hooligan fantasy. He destroys an anthill, cuts a tree with a knife, tries to catch a spider. When he fails, he starts chasing a butterfly. He doesn't know that under this figure hides the prince of white and black magic. Wanting to punish the unruly boy, the sorcerer reduces him to the size of an insect. Mark, reduced to the size of an insect, must learn to live in completely new conditions. This is by no means easy.

Second half of September 1939. Lt. Brejer, along with a detachment of his sappers, receives orders to blow up the bridge. The promised explosives do not arrive. So Brejer gets the order to withdraw and reunite with the rest of the division. Along the way, suffering hunger and discomfort along with his soldiers, he joins various divisions, collects survivors and fights. From a German prisoner of war, he finally learns that the Soviets have entered Poland. Finally, he and his men manage to reach his home unit, but that unit has just surrendered to the Germans.