The post-state farm village of Piaski in Pomerania. A deputy minister shows up in the village. He is interested in finding a bust of Lenin, in which the now deceased former secretary of the Polish United Workers' Party smuggled a diamond of enormous value, the "Eye of Siberia." The confidential conversation between the deputy minister and the village head accidentally overhears the unemployed Stanislaw Michalek. He informs his friends about the case. The three men decide to find the secretary's treasure. The problem is that the secretary had a collection of busts of Lenin, which are now strewn all over the village.

The 1960s in Masuria. Mikołaj Biesaga, seriously injured during the war, swore that if he survived, he would build a chapel to the Blessed Virgin Mary. Years passed, and the "miraculously saved" person did not keep his promise. Now feeling that it is probably time to die, he decides to fulfill his obligations.