Zarah Leander was one of the greatest film stars of the Third Reich. Adored by the Nazis, she rose to become the highest-paid female film star of National Socialism. To this day, she remains inextricably linked to our collective memory, reviled as a "Nazi siren" but also loved unconditionally. At the same time, there are files in Sweden that claim she was a Russian spy. Extremely contradictory rumors that continue to shape the myth of Zarah Leander to this day. She herself described herself as completely apolitical. "The Zarah Leander File" delves into the life of the Swedish film diva and asks: Who was the woman behind the mysterious gaze, the frivolous songs, and the pompous gestures? Who was "Leander" really?