Famous author Bretonneau gets his ghost writer Moluchet to impersonate the notorious criminal Jim la Houlette and pretend to steal a manuscript to boost the sales of their novels.
A bank guard disappears from the elevator between the ground floor and the first floor. He was carrying a briefcase containing valuable documents. Tortoran, a young journalist, is responsible for following the case and unmask the ingenious acrobat who is the author.
A young customs officer is given an important mission: to investigate drug trafficking on the Belgian border. Incognito, he goes to the place where he easily spots the gangsters.
