Ireland, June 1944. The crucial decision about the right time to start Operation Overlord on D-Day comes to depend on the readings taken by Maureen Flavin, a young girl who works at a post office, used as a weather station, in Blacksod, in County Mayo, the westernmost promontory of Europe, far from the many lands devastated by the iron storms of World War II.
With the help of government-issued pamphlets, an elderly British couple build a shelter and prepare for an impending nuclear attack, unaware that times and the nature of war have changed from their romantic memories of World War II.