October 1944, in the so-called Republic of Salo, the last fascist stronghold in Italy. After months of ferocious fighting on the Gothic Line, Colonel Martin Bora of the Wehrmacht must investigate the theft of a precious painting of Venus by Titian, stolen with uncanny ease from a local residence. While Bora's inquiry proceeds among many difficulties, the discovery of three dead bodies throws an even more sinister light on the scene. The victims are female, very beautiful, apparently dead by their own hand but in fact elegantly murdered.