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.

Set in the 1930s, the series is about the impossible love between a poor young man from the province, an unemployed law graduate and a talented singer, and the rich and sensitive heiress of a bank manager and owner.