Four days of Mateusz Wilczek (1970)

Sinopsis

Mateusz, a Polish Border Guard, takes part in an operation to push migrants camping in a border forest back to Belarus. Among them is a family with children who claim to have lost important belongings. Returning to the site the next day, Mateusz finds their bag containing a phone number, which he impulsively calls. Over the next days, he receives unsettling messages and wrestles with what to do with the items in his possession. A story about the nature of forgetting in the European borderlands.