Episodic portrait of a criminal, from 1934 until after the war. Roberto Borgo is tough, cool, sardonic, loyal, and deadly. He comes to Marseilles to help his friend Xavier Saratov get out of jail, first killing a local brothel and casino boss to take over the businesses, and, with the help of Xavier's sister, Georgia, amass money for Xavier's defense. Xavier loses in court, so Roberto gets himself thrown in prison to be with his friend. Escape proves futile, but they are pardoned in exchange for working as sappers. After the war, Xavier is a bitter cripple, but Roberto remains detached, extorting ownership of a casino, which puts his friends at risk. Does he care?

France, 1942, during the occupation. Philippe Gerbier, a civil engineer, is one of the French Resistance's chiefs. Given away by a traitor, he is interned in a camp. He manages to escape, and joins his network at Marseilles, where he makes the traitor be executed... This non-spectacular movie (do not expect any Rambo or Robin Hood) shows us rigorously and austerely the everyday of the French Resistants : their solitude, their fears, their relationships, the arrests, the forwarding of orders and their carrying out... Both writer Joseph Kessel and co-writer and director Jean-Pierre Melville belonged to this "Army in the Shadows".