Les Films Marius Bouchet

La moucharde stars Dany Carrel as a young miss who loves neither wisely nor well. Duped into a life of crime, Carrel remains on the wrong side of the Law because she's hopelessly in love with a two-bit crook. Soon she becomes as jaded and hardened as her criminal cohorts. When the police threaten to throw her in the Bastille, Carrel agrees to turn informer, with the expected disastrous results.

The two merrymakers Cartahu and Bailladrisse sail together on a cargo ship. When customs officers come aboard to conduct a search, Cartahu is unaware of a drug dealer's accomplice, who hides the box of narcotics in Cartahu's bag, which has already been visited. Unsuspecting, the two comrades go ashore, taking the precious box with them. At the hotel, by mistake, their luggage is given to another person. To recover the merchandise, the traffickers pursue the two friends, who nevertheless manage to have the whole gang arrested; and, after being tempted by pretty women to live with them, prefer to set sail for new adventures.