The film moves through the Australian War Memorial galleries: the Midget Submarine, the Aircraft Hall, the Roll of Honour cloisters and ANZAC Hall, each section carried by a different historian speaking to their own life's subject. Woven through it is narrator Ian Oliver's own memory of the building, while a parallel thread descends into the wartime bunkers built to defend Canberra that visitors never see.

Beneath Canberra's carefully planned streets and iconic national landmarks lies a hidden network of wartime bomb bunkers that few Australians know exists. Built during the Second World War to protect military personnel, government operations and critical infrastructure, these underground spaces tell an extraordinary story of Australia's preparedness during one of history's most uncertain periods.

This feature documentary uncovers the forgotten history of the RAAF Fairbairn war bomb bunkers, Pooh Corner and the Calthorpe House bunkers. It brings together military historians, heritage experts, archaeologists and rare archival material to reveal the people, engineering and strategic importance behind these remarkable sites in the nation's capital, during its darkest hours.