1969. In a
Vienna bookshop the Argentine chemist Rafaelo Aranda is poisoned by the bookseller Valerie Steinfeld. The bookseller commits suicide immediately afterwards. It seems the bookseller has never met him before. The chemist's son, Manuel Aranda, wants to find out the background of this murder. He finds out that his father has developed chemical weapons of mass destruction and offered to sell them to the United States, the Soviet Union and France. The Secret Services of these countries try to prevent Aranda from publishing these facts. Aranda survives a first sniper attack without even noticing it. Manuel Aranda learns that Valerie Steinfeld was involved in a risky paternity trial during the
Third Reich. Her half-Jewish son was to be protected from the Nazis. Valerie Steinfeld had persuaded a friend to claim he was her son's father. The friend had no Jewish background and was a registered member of the
Nazi Party. Slowly the suspicion arises that Steinfeld and Rafaelo Aranda might have had to do with each other at this time. With the help of Irene Waldegg, the niece of Valerie Steinfeld, Manuel Aranda finds out about the Nazi past of his father. But Valerie Steinfeld also had her personal secret. Not even Irene Waldegg had known that she also was a part of Valerie Steinfeld's past. ==Cast==