On June 6, 1944, thousands of Allied servicemen landed on the shores of northern France, tasked with liberating western Europe from Nazi tyranny. Over the ensuing hours and days, the men faced decimating machine-gun fire, mortars and artillery, eventually fighting their way inland, but not before suffering a staggering number of casualties. To commemorate the 70th anniversary of the Normandy landing, four D-Day veterans gather at the famed Museum of World War II outside of Boston, Mass. to share their experiences from that fateful "Day of Days." Cameras eavesdrop on their conversations as they vividly recall details from their ordeal - from the perils of the amphibious assault to the invasion's gruesome aftermath. Their interactions with one another yield long-buried, and often painful, memories. They recount their transformations from boys to men, reveal their uneasiness with the term "hero," and grapple with why they survived when so many others did not.