Following his paranoia, he pursues his sub-tenant, a returnee from France, whom he sees as an agent of dark imperialist forces, an enemy of the state, and a spy.

[3] Ilija Čvorović (Bata Stojković), a former Stalinist who spent several years in a prison in Goli otok, is contacted by the police to routinely answer questions about his sub-tenant, Petar Markov Jakovljević (Bora Todorović), a businessman, who spent twenty years living in Paris, and has now returned to Belgrade to open a tailor shop.

As time passes, Ilija becomes convinced that Petar, a modern man from a capitalist country, represents a great threat to national security and the socialist system, and begins spying on him.

Eventually, he bars his house, buys a guard dog, arms himself with munition, and even gets help from his brother Đura (Zvonko Lepetić), who also becomes convinced that Petar is a foreign agent.

The main character, Ilija Čvorović, who was a victim of such a political mechanism and tyranny, now takes on the role of the persecutor and becomes an instrument of that very system as he pursues and spies on Peter, a completely innocent person, in order to prove his obedience to the authorities.

Thus he turns out to be a tragicomic figure who completes a full circle of infernal insanity of an order that promotes paranoia, fear, hatred and loss of reason.