September 1940: the height of the Blitz. When The Savoy advertises its very safe underground shelters, a crowd of people from Stepney in East London arrive at the hotel and demand entry. There they find a shelter worthy of The Savoy's clientele: a dormitory with curtained and separate sleeping quarters for single men, single women and couples, with matching bedlinen; a curtained recess housingthe sleeping Duke and Duchess of Kent; sandbags painted in the colours of the Union Jack; a dance floor and a well-stocked bar. But the next morning, after the raid and when the Stepney protestors have left, it is discovered that one of the hotel's guests is dead, stabbed through the heart.
Detective Chief Inspector Coburg and Sergeant Lampson are called in, and the finger of suspicion falls firmly upon the East Londoners, but not everything is as it seems in these sumptuous surroundings...