Synopsis for
Le Doulos (1962) More at IMDbPro »Le doulos (original title)

Gangster Maurice Faugel (Serge Reggiani) takes a long walk to meet a fence, jewel thief Nuttheccio (Michel Piccoli) where upon he shoots him and takes a large amount of cash, jewels, and a gun. When Maurice hears a car arrive he jumps out a window and buries his loot beneath a lamp post on a deserted road. Later back at his apartment where he is living with his lover Therese (Monique Hennessy), Maurice meets with Silien (Jean-Paul Belmondo) and Gilbert (René Lefèvre) two gangsters who are helping him prepare for a small burglary. Maurice has had Therese case the house he is going to rob and she alerts Maurice to the rumor that Silien is a Police informant, something to which Maurice claims he will give Silien the benefit of the doubt until he has absolute evidence. On the night of the burglary as Maurice and a partner go to the job, Silien returns to Maurices apartment and tortures Therese for the address to the location of the crime. When the police arrive Maurice and his partner try to escape, killing a policeman on the way as Maurice passes out from a gun shot. Maurice wakes up after being tended to by a doctor and determines to get even with Silien whom he believes has ratted him out, but before he can he is apprehended by police Superintendant Clain (Jean Desailly) who holds Maurice for killing the policeman. Meanwhile Silien who is determined to retire, has been coerced into working with the police but is determined to help his friend Maurice and find out who the real informant is. Along the way there is a gangster showdown in a ramshackle building and a few loose ends to trim before the real culprit is taken care of.