Shot in a docudrama style (with captions identifying the different participants), the film opens in the days leading up to D-Day, concentrating on events on both sides of the English channel. The Allies wait for a break in the poor weather while anticipating the reaction of the Axis forces defending northern France. As Supreme Commander of SHAEF, Gen. Dwight Eisenhower makes the decision to go after reviewing the initial bad weather reports and the reports about the divisions within the German High Command as to where an invasion might happen and what should be their response.