Two children are born in a rich family's manor house - one of them, Gogo, is a son of a countess and the second one, Maciek, a son of the servant. The servant decides to switch the babies so her son can have a better life. They both grow up and fall for the same woman, a girl named Kasia raised by the countess.

Franciszek Brodniewicz reprises the role of Duke Waldermar Michorowski he played in the 1936 "Tredowata." Here, he leaves his recluse existence to help rescue the victims of a great fire, and suffers severe injuries. In his delirious state, he believes he is being taken care of by his dead wife, and (amara Wiszniewska, who is serving as his nurse, thinks his statements of love are meant for her. He is subsequently forced to disillusion the girl when he becomes normal, and she drifts into a casual love affair, but later falls in love with the Duke's nephew, (Wojciech Wojtecki.) The Duke later takes his nephew's place in a duel with the rejected suitor.

Stefcia Rudecka starts working as a governess in an aristocratic house. Waldemar, the young heir, falls in love with her but his well-off family is not eager to accept the woman he loves.

In the last few days of the Warsaw Uprising during World War II, a modest group of Resistance members remains. The band must take refuge in the sewers under the orders of leader Zadra, but it's only a matter of time before they will have to emerge. However, when they try, they are met only with intense hostility from the Nazis. Despite their attempts stay resolute through immense mental strain, it becomes increasingly apparent that they may be doomed.