|Jerzy Radziwilowicz||Mateusz Birkut/Maciej Tomczyk|
|Tadeusz Lomnicki||Jerzy Burski|
|Michal Tarkowski||Wincenty Witek|
In repressive mid-1970s Poland, documentary filmmaker Agnieszka begins work on a film about Mateusz Birkut, a bricklayer who had briefly been hailed as a hero of the proletariat in the 1950s, but then disappeared into obscurity. In piecing together details about the bricklayer's mysterious life, she discovers that his involvement in organized labor had been viewed negatively by party bosses, and that her own investigations could put her in danger.