Le Cas du docteur Galloy

A journalist and a police commissioner join forces to smash a white slavery network operating in the Middle East. The cabaret run by Clovis where Dalida sings is quickly spotted, as is a marriage agency run by Madame Irma, offering semblance of guarantees. Clues without proof. The journalist's fiancée agrees to play the game set up by the superintendent. The network is dismantled.

Commissaire Masson tells a young journalist about the only failure of his career: the wife of a Canadian secret agent, pursued by speculators, tried to deceive them. Unsuccessful, she shot her blackmailer to protect her husband, deceiving public opinion. How guilty was she really?

A cabaret is used as a cover for drug trafficking, but the police are unable to uncover the means used to smuggle the opium. It turns out that one of the accomplices is repatriating the bodies of her compatriots who have died abroad and smuggling the drugs. A race is waged between the police and the culprits: the law triumphs.

Two women, Léa and Clotilde, with two men, Ludovic and Papillon, form a nice quartet of crooks. Their targets: pharmacists, diamond dealers, and gogos of all kinds who respond to enticing classified ads. Business is booming, but the police are watching. Commissioner Masson will eventually arrest them, but, ironically, for a matter of which they are totally innocent.

A months-long investigation by Interpol's special services has already revealed the identity of the main trafficker in Paris, a certain Chando and his accomplice Magda. They run a cabaret in Montmartre where the drug is regularly distributed, but the police are still powerless to discover the means used by the traffickers to move opium between Istanbul and the major capitals. A network is organized to follow a certain Madeleine who regularly makes the journey. Her luggage was searched in vain, and the consul, when asked about her, could only praise her: she had long been devoted to repatriating the bodies of her compatriots who had died abroad, free of charge, when the families so wished. On the other hand, the French police are on the trail of Mathias, accused of murdering an old peasant who claimed the inheritance of his son, who died abroad.

A young girl from the provinces ends up in Paris and falls into the vicious circle of prostitution, before resolving to denounce her torturers to the police.