Paris, Friday 14 June 1940, On the first day of the Nazi occupation of Paris, four Polish refugees are found gassed in a railway truck, A fifth commits suicide later that day, With his own psychological scars from the Great War, Paris police detective Eddie Giral is determined to find out exactly what happened, even if it means taking on the Occupier, But as he investigates, he meets a clandestine group of Polish exiles and a mysterious American journalist, which leads him to discover shocking evidence to back up the rumours of atrocities coming out of Poland, Suspecting a connection with the deaths of the Polish refugees, Eddie pursues the lead despite opposition from his French colleagues and threats from the German officers they now have to report to, As Eddie tries to bring the killers to justice and to uncover the truth behind the rumours, he finds himself in a much more dangerous and sinister world than any he's known before, , ,