London, 1939. As war is declared once more, a shadow falls over Britain. The staff at the luxurious Buckingham hotel must do all that they can to keep their important guests happy, but behind the scenes, they are scared. Away from the glitz and the glamour of the ballroom, they must face this new reality. Newlywed Nancy knows that her brave husband—debonair dancer Raymond de Guise—will want to fight for his country and enlist. She loves and supports him but is heartbroken at the thought of their being apart and scared of the dangers he'll face. With a new hotel manager at the helm, no one knows what the future holds. But as fashionable society retreats from London and staff depart to sign up for service, one thing is certain: life at the Buckingham will never be the same again.