Deadlier Than the Male (1957)

In Les Halles in the heart of Paris the restaurateur André Chatelin leads an uneventful life until the arrival from Marseille of Catherine the daughter of his exwife Gabrielle She tells him her mother is dead and that she is without resources Chatelin welcomes her under his roof then marries her Gérard a young student that Chatelin looks upon as a son becomes Catherines lover and she sets him at odds with Chatelin She asks him to kill the restaurateur He refuses She kills him Having discovered that Gabrielle is still alive declined and drug addicted Chatelin realises the darkness of Catherines soul who has always lied to him