This documentary explores the pivotal role of British airfields during the Second World War, focusing on the strategic importance of Tangmere and the clandestine operations of the Special Operations Executive. Through interviews with historians and curators, the film reveals the hidden history of these sites, from the fierce air battles of the Battle of Britain to the secret training of agents who were dropped into occupied Europe. It highlights the ingenuity and bravery of the pilots and personnel who operated under extreme conditions, often using unconventional methods and equipment to support the war effort and secure victory.