Speaking of Murder

In Paris, Louis Bertain is the owner of a legitimate garage business, but secretly is the chief of a gang of thieves composed by the sadistic Pepito; the coward Fredo; and Raymond, the sailor. Louis is a bon-vivant that lives with his mother Ms. Bertain and his young brother Pierre, who is a small-time forger that is on probation. When Pierre visits his girlfriend in Paris, the easy manicurist Helene, he breaks his parole and the police tries to force him to become an informer, but Pierre declines the offer. While planning the next rob with Pepito, Louis notes that Pierre has overheard their conversation, but Pierre denies. The robbery goes awry, with two murders, and the police arrest Louis that finds who has denounced them. But Pepito believes Pierre did and is hunting him down.