The novelist Suzanne Delmont creates a character, "The Uncatcable Frédéric", a sort of Arsène Lupin. A mysterious stranger launches a press campaign accusing him of having a harmful influence on young people...
| Actor | Role |
|---|---|
 Renée Saint-CyrSolange Delmont | Solange Delmont |
 Pierre BertinGranier | Granier |
 Jeanne Fusier-GirJustine | Justine |
 Pierre PalauPetithunier | Petithunier |
 Henri VilbertPoliceman | Policeman |
 Annette PoivreMartine | Martine |
 Paul FaivrePublisher | Publisher |
 Richard FrancœurNot listed | Not listed |
| RRobert ClermontExpert | Expert |
 René AliéNot listed | Not listed |
| RRoger BontempsNot listed | Not listed |
| AArsenio FreignacNot listed | Not listed |
| HHenry MurrayNot listed | Not listed |
 Denise GreyMiss Baxter | Miss Baxter |
 Paul MeurisseB.B. / Richard Fernay | B.B. / Richard Fernay |
| PPaul Delauzac(uncredited) | (uncredited) |
 Marcel Loche(uncredited) | (uncredited) |
 Claire Mafféi(uncredited) | (uncredited) |
 Jean Meyer(uncredited) | (uncredited) |
 Marcelle Rexiane(uncredited) | (uncredited) |
 Howard Vernon(uncredited) | (uncredited) |
| HHenri Vérité(uncredited) | (uncredited) |