Brylanty pani Zuzy (1972)

A spy and diamond smuggler who wants to go from the Middle East to his contacts in Poland suddenly finds himself sitting across from his double on the plane. Before he knows it, he is drugged and taken to the police for questioning. From now on, the double Filip, the Polish security officer, plays his "role" and hopes to learn details about the agent ring in this way. So he ends up in the head office of the traffickers, an old villa near the port. From here, diamonds and espionage information are sent abroad by ship. Finally, Filip's cover is blown and the gangsters try to murder him.