The film follows the trial of Croatian terrorists Zvonimir Pospišil, Mijo Kralj and Ivan Rajić, accomplices of the Bulgarian assassin Vlado Georgiev Chernozemski, who killed King Alexander of Yugoslavia and the Minister of Foreign Affairs of France Louis Barthou, on October 9. 1934 in Marseille, France.
In a series of comic situations, the hilarious Simeon, with the help of his extramarital sons, Momir and Dragan, and his roommate, Marina, manages to deceive everyone he meets on the doorstep of his apartment in the center of Belgrade.
