Karl from Germany and Marcelo from France emigrated to Argentina and became brothers-in-law. Whatever happens later they will always preserve a strong family feeling. Karl soon returned to Germany to serve in the army. Marcelo and his children Julio and Chichi became Argentinean citizens but later returned to Paris. Karl became a general with a son (Heinrich) in the SS. During WWII he got a high job within the occupation administration in France. Heinrich would come and go. Julio was a playboy. Chichi joined the resistance and was eventually tortured to death by Gestapo. Julio has a relation to a woman whose husband is a POW, and who will after release become a district leader within the resistance movement. Julio eventually feels that it is his duty to fight the Nazis. With a firm reputation as a superficial playboy, he can attend the nightclub favoured by German officers and gather much important information. Finally he and another partisan (posing as his chauffeur) accept a highly important suicidal task involving a courtesy call to Heinrich.