Unity Mitford was born into British aristocracy and became one of the most notorious English admirers of Adolf Hitler, whom she called "her beloved Führer." This film traces her path from the English upper classes to Munich in the 1930s, where she immersed herself in Nazi social circles and cultivated a personal relationship with Hitler himself. Archival footage and photographs sit alongside reenactments and historian interviews to reconstruct how a young Englishwoman came to embrace the Nazi cause so completely that she adopted its language and customs as her own. The film builds toward September 3, 1939, the day Britain declared war on Germany, when Mitford, unable to reconcile her loyalties, attempted suicide in a Munich park. Historians and people connected to her story weigh in on what drove that devotion and what it cost her. The result is less a mystery than a case study in how ideology can override family, country, and self-preservation, told through one woman whose choices placed her on the wrong side of a war her own nation fought.