London, 1937.

With a new King in place, tensions are rising in London and across Europe. Shaken by the Great Depression and with talk of another war coming, the Buckingham hotel is trying to regain some stability. But demonstration dancer Raymond de Guise is noticeably absent from the Grand Ballroom dancefloor.

Downstairs, chambermaid Nancy Nettleton misses him, but is finally starting to feel more settled at the Buckingham, and hopes her brother Frank will soon call London home, too. But how will timid Frank handle the big city? Will he be able to cope with the more unexpected tasks asked of him at the hotel?

And upstairs, Vivienne Edgerton is desperate to do something worthwhile with her time and her step-father's money, rather than spending it on dresses and frivolities - but will this land her back in trouble?
The staff and guests of the Buckingham soon discover that in a hotel full of secrets, there's always someone listening . . .