Hitler's British Girl (2007)

When Unity Mitford, the nineteen-year-old daughter of Lord Redesdale, told their parents in 1934 that she wanted to go to Germany to get acquainted with the language and the culture, no one could have guessed that soon a romance would flourish between this young and unexperienced girl and the dictator Adolf Hitler, a relationship that would astonish both Germans and Britons, and seal the fate of the unfortunate Unity.