Balkan Spy (1984)

In this film, Danilo Stojkovic plays a deeply devoted Stalinist and fervent anti-capitalist, a patriotic yet paranoid "comrade." One day, a businessman who has lived in France for a long time returns to his homeland and rents a house. Danilo, convinced that this poor man is a spy for capitalists and is working against Yugoslavia, begins to follow him. He stalks him day and night, enduring all sorts of strange events, but he never gives up... and then things get interesting!