Two friends think that they've discovered a dangerous spy hiding in a mine shaft.

A young locksmith, Jerzy, builds an airplane. By chance, he meets the Brazilian millionaire Tomasz Kotlica and his daughter Janina. Witold Siemacki, an aviator, stands in the way of Jerzy's career and happiness.

Witek and Krysia, a married couple, move to Warsaw and have nowhere to stay. They rent a room in a house with many other lodgers. Witek dreams of their own house and draws a sketch of their future home, marking the place where his wife will sleep with the word "treasure". The other lodgers find the draft and a frantic search for the treasure begins.

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.

Polish composer Stanisław Moniuszko fights for the right to stage his opera "Halka".

Young Frederic Chopin comes of age during a tumultous time in Polish history.