Journalist and broadcaster Geraint Talfan Davies journeys to Berlin to uncover the story about his uncle, Idris Morgan, a young Welshman witnessing Nazi power at first hand in the 1930s. His uncle's diary is his only guide as he unveils the story of a friendship with a young German girl and her mysterious death - a death that brought Idris face to face with Wilhelm Brückner, Adolf Hitler's chief adjutant, only days before the massacre of the Night of the Long Knives. This is a personal story of a dark epiphany, as well as a moving tale of an ordinary family adjusting to the growth of Hitler's power.