Documentary about the making of a 1945 film by director Alfred Hitchcock about the liberation of Europe by Allied forces. Commissioned by Sidney Bernstein, chief of the Psychological Warfare section of the Supreme Headquarters of Allied Expeditionary Force (SHAEF), the film looks deep into what went on in the infamous German concentration camps. As it was deemed unsuitable to show at the time, it was stored away in the vaults of the Imperial War Museum (IWM) and found 40 years later by an American researcher. Now, fully restored by the IWM's Dr Toby Haggith, the footage is ready to be shown to audiences and this documentary tells the story of the lost film.