Sophie Mallet is the lively manager of a detective agency, assisted by Emile Gachit, her conscientious but not very effective right-hand man. One day a fellow named David entrusts her a pack of cigarettes that she is supposed to hand over to a certain John Smith. But David soon disappears while John Smith is murdered. Moreover, a lot of dubious characters prove "very interested" in the pack of cigarettes... Which will keep Sophie and Emile for some time...!

In 1635, Jacques du Parquet, the nephew of the well known explorer Belain d'Esnambic, enters a tavern in Dieppe, and falls in love with the daughter of the bartender, Marie Bonnard. He knows his noble family would disapprove such a marriage; besides, he is nominated for the post of governor in Martinica. He promised never to forget Marie, but as time goes by, she will accept to marry a rich and unscrupulous man, Monsieur de Saint-André. When her husband is appointed to serve in Martinica as General Commissioner, Marie demands to go with him. At her arrival, all sorts of trouble arrive: pirates take action against travelers and goods, rotten deals set the two officers against each other, and finally jealousy settles to make things worse.

Rival brother and sister Gaëtan and Chantal, the last heirs of the late billionaire financier Omar Porassis, use every trick in the book to try and claim his fabulous inheritance when two of Omar's natural sons, Roger and Marc, are found. The brother and sister try to manipulate Marc and Roger into stealing their inheritance. After discovering the deception, the two half-brothers join forces to escape the many traps set by Gaëtan and Chantal, who try to eliminate them by any means necessary.

An American polo player in Paris gets roped into intrigue when he's asked to find a family friend whom has gone missing.

Renowned atomic scientists are kidnapped on French soil. Inspector San-Antonio and his loyal deputy Bérurier infiltrate a gang suspected of involvement in the case, in order to trace the trail.

Léo Fardier is a police inspector who goes to prison undercover as a convict. He shares a cell with Mariani, a Corsican mafioso, whose trust he earns. The day Léo leaves prison, the criminal entrusts him with a letter to deliver to his estranged wife. He finds her, and she falls under his spell. The problem is that he, too, has fallen in love with her.