1943. Britain’s Home Front is feeling the pain of war.
The Fourth Operational Corps has other things to worry about. A downed plane in the High Peak leads Professor Travers to a village full of buried secrets and a family that are far more than they seem.
Her first assignment sees new recruit Eileen Le Croissette infiltrating a Sheffield Steelworks. Buried within is a weapon that could change the course of the war, but what does the secretive Mr Huxtable have to do with it?
Avoiding his domineering father, Matthew Lethbridge-Stewart is also on the case. But he wasn’t banking on meeting a group of homicidal little robots...
The pieces are being set for another conflict, one that started a long way away, to erupt in the middle of wartime Britain.