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.

Eva Sweeney
as Young Maureen Flavin Sweeney

Colin Wright
as General Dwight D. Eisenhower

Mike Johnson
as Captain James Stagg

John Downes
as Met Éireann Telephone Operator

Antony Beevor
as Self - Historian

Robert Gerwarth
as Self - Historian

Susan Eisenhower
as Self - Eisenhower's Granddaughter

Joseph Skelly
as Self - Historian

Richard G. Trefry
as Self - Retired US Army Lt. General

Maureen Flavin Sweeney
as Self - Weather Observer (1944)