London, 1944. The air raid sirens are blaring, bombers are hovering. The war with Germany has been raging for four years and there's no sign of peace coming.
Dot Gallagher is newly arrived from Liverpool and working as a nurse. During an air strike, she encounters an enthralling group of American GIs who tell her all about Rainbow Corner, a social club for US troops in Piccadilly it's a wartime oasis where they can forget their fears, fall in and out of love and dance the nights away.
It's here that Dot finds a new best friend in Lilly. And together, against the stark realities of war, they must learn to face their fears, uncover secrets and discover the true meaning of love.