1942. Paris is a city under occupation. Detective Inspector Lafarge, a former prisoner of war, is sent to investigate the murder of the beautiful young film actress Marguerite Suchet. The man who has called upon him is the Vichy chief of police René Bousquet - who Lafarge despises. The chief suspect is a lawyer and avowed anti-Nazi, Pierre-Yves de Chastelain. But is he only being targeted because of his run-ins with the law before the war broke out? As Lafarge becomes increasingly repelled by his colleagues behaviour towards all those who oppose the Nazis, he must question the allegiances and loyalty of everyone around him...and ultimately his own as well.