1942. In a hospital south of London, Major Charles Davenport recovers from wounds received at Tobruk. In Whitehall, a top secret operation is underway. Britain's War Office is hard at work on a plan for the future invasion of the Continent - a plan destined to include Davenport. Across the Irish Sea, a young American widow seeks refuge on Ireland's eastern shore. Mary Katryn Kennedy has suffered her own wounds - the recent death of her husband and young child. Ireland remains steadfastly neutral in the War, but the island is a battleground nevertheless, home to desperate IRA plotters and German provocateurs. Two separate lives, swept up in a year of crisis, and brought together in Cardigan Bay.