A film about the life and activities of the Polish revolutionary Ludwik Waryński. In his memoirs, Ludwik returns to his student years in St. Petersburg, to Warsaw, to Krakow, where he was arrested and put on trial. After the end of the process in Krakow, Waryński leaves for Geneva, where he meets with Russian revolutionaries. In 1881, he returned to his homeland and created the first party of workers in Poland...

Nights and Days is a family saga of Barbara Ostrzeńska-Niechcic, and Bogumił Niechcic, against the backdrop of the January Uprising of 1863 and World War I. The film is a rather straightforward and faithful adaptation of a novel by Maria Dąbrowska with the same title. The plot is woven around the changing fortunes of a noble (upper-class) Niechcic family in the pre-WWI Poland. There are two main crossing threads: a social history one and an existential one.

When a political decision is made as to the location of a new large chemical factory, Stefan Bednarz is put in charge of it. This honest communist party man has to confront the local community opposing the construction.