In Florence, a young American student goes missing. At first neither Alessandro Pallioti, one of the city’s most senior policemen, nor Enzo Saenz, his deputy, are too concerned. But soon the men are horrified to discover that the older man Kristen has been spending time with is Antonio Tomaselli, a member of the notorious Red Brigades. Then, before the police can get a handle on the case, Kristen's stepmother, Anna, also vanishes.
It is the autumn of 1943. Italy signs the armistice that will take it out of the war, and slides into chaos. In Florence, two sisters, Isabella and Caterina Cammaccio, find themselves surrounded by terror and death. Determined to take on not only the Nazis but also the newly resurgent Fascists, bands of Partisans rise up. In the present day, Alessandro Pallioti, one of Florence’s most senior policemen, would not normally oversee a murder investigation.