Nikodem Dyzma is a poor dancer who comes to Warsaw to find a job. The problem is that nobody wants to hire him. One day he finds an invitation to the party with very important people and decides to attend. A small accident at the party makes him the hero of the night and becomes the beginning of his career.

Rumsza, the elderly railwayman, leading a sedate life with his wife, misses his only remaining son (two older boys were killed in the war). Joziuk finally returns from the military in the first scene but with the pregnant Zosia, while Rumsza expected him to marry Celinka, the daughter of Krywka, his only friend and neighbour. The hero will not accept the new situation; he throws his son and Zosia out of his house. Celinka is distressed but she still harbours hope for Joziuk. The birth of the child changes the situation: Rumsza accepts his son's relationship but Celinka decides to leave.

A story of the love affair between Janek Małodworny and Hanka, daughter of the kulak Nalepa. The two love each other, but their happiness is hampered by differences in possessions. To make matters worse, Małodworny is in favor of establishing a cooperative along Soviet lines, while old Nalepa is staunchly opposed.

In the last days of World War 2, people of various ethnic background meet in a Polish military hospital in a small German town, whereas a Nazi SS division hides in the local forests and tries to move westwards.

A fairy tale film based on an ancient legend about the founding of Warsaw and the good fairy Sirene of the Mazovian forests, who became the patron saint of the city.