It's 1940 - France has fallen, and Britain stands alone against the might of the German war machine; a fierce battle for supremacy of the air rages in the skies as the Battle of Britain hits full stride.
For Chief Inspector Frank Parade and his much-depleted team, there are many challenges to policing the small Welsh mining village of Gilfach Goch, for while miles away from the theatres of war, the home front faces unique challenges of its own. The wartime demands thrown on the country mean that each officer in Parade’s team must do the work of two men - three even.
Soon, the already overwhelming workload is increased when not one, but two bodies turn up, and Parade finds himself having to investigate two murders as well as cope with everything else thrown his way.