In the midst of World War II, the Allied forces prepare for one of the most ambitious and dangerous military operations in history: the invasion of German-occupied Western Europe through the beaches of Normandy, France. Known as Operation Overlord, the massive assault is meticulously planned to break the Nazi stranglehold on Europe and pave the way for victory over Adolf Hitler's forces. The film takes the viewer through the intricate preparations for the invasion, highlighting the complexity and scale of the logistics involved. From gathering intelligence and training troops to manufacturing and amassing the equipment needed for such a colossal endeavor, every aspect of the operation is explored with detailed attention.

As the fateful day of June 6, 1944, approaches, the film portrays the nervous anticipation and resolve amongst the troops, who come from all over the world to unite in this fight for freedom. The multi-national force, composed of American, British, Canadian, and Free French soldiers, among others, braces for a battle that will test their courage and determination. The film captures the significance of the landings, showcasing the stunning visual spectacle of the naval armada and the air power assembled, as well as the intimate human stories of those who fought and sacrificed on the beaches code-named Utah, Omaha, Gold, Juno, and Sword. As the first wave of soldiers lands on the Normandy coast, history is made in a monumental clash that will come to define the turning point of the war in Europe.