A Las Perlass, ville de jeu du Névada, les bandes rivales de Lippy et de Steinberg tiennent les plus beaux établissements de l'endroit. Franck Bradford a engagé comme comique Jeff Burlington, lequel, pour dérider un difficile public, lance chaque soir des attaques verbales contre le casino de Lippy où, dit-il - les jeux sont truqués. Chacun des deux gangs envoie un homme de main afin que, de part et d'autre : soit il cesse ses sarcasmes soit, au contraire, il aura des ennuis s'il ne laisse pas son numéro tel qu'il est. Un certain "Main d'ours" qui n'est autre que Bradford fait attaquer les casinos. C'est Jeff, après avoir été kidnappé par les deux bandes devenues amies, qui démasquera le coupable.

Having cured the local café owner, Diogène Leguignon becomes convinced that he is a healer and possesses the fluid. His wife sees the benefits of this gift and urges Diogene to exercise his power, particularly on a wealthy old man, M. Coq. Arlette Leguignon, however, is in love with a young doctor, who is violently opposed to her future father-in-law. Leguignon ends up condemned and, disgusted, no longer wants to look after others. When Mr. Coq dies, making him his legatee, Leguignon has to contend with the Coq family. This time, Doctor Martinet comes to his defense. The inheritance is used to build a clinic where Leguignon can carry out his experiments as a magnetizer.

The blueprints of an aeroplane built from an ultra-secret metal are stolen from national security. French secret service agent Walder believes that the documents are now in Switzerland, in the hands of a man named Lindbaum. The latter agrees to hand over the blueprints in return for a large sum of money. Another agent, Francis Coplan, is sent to Switzerland to handle the deal, but Lindbaum only has half of the documents because he was double-crossed by Kalpannen, an international crook. With the help of Heidi, a Swiss correspondent, Coplan sets out to identify the members of Kalpannen’s gang, only to find that they have all been murdered…

A simple man gets involved in an implausible story of gangsters in the wake of the discovery of a criminal's dead body in his own bed.

Paul Lamiani, a wizened mobster, is asked to return to duty following the disappearance of secret documents of extreme importance. It is assumed that they are in the hands of a friend of Paul. But the case becomes even more delicate when Lamiani's son is kidnapped.