In the elevator of two large Parisian buildings, a telegraph operator discovers the body of an elderly woman, Madame Mathieu, the owner of both buildings. Boucheron (Lucien Baroux), the local superintendent, is dispatched to investigate, along with his rival, Inspector Lambert of the "Sûreté" (Jacques Baumer). To solve the enigma, they scour staircases and corridors, visiting every floor of both buildings, courtyard and facade. Their gruff rivalry allows them to complement each other in discovering who committed the crime among a gallery of characters, humble or rich, who all have something to be ashamed of... A rare, fast-paced, picturesque comedy set against the backdrop of a police mystery.
Lucien Baroux
Jacques Baumer
Jules Berry
Gaby Morlay
Elvira Popescu
Michel Simon
André Lefaur
Gaby Sylvia
Andrex
Simone Berriau
Erich von Stroheim
Betty Stockfeld
Jacques Dumesnil
Missia
Paul Faivre
Aimé Clariond
Raymond Segard
Marcel Orluc
Marguerite Moreno
Gabrielle Dorziat
Jean Daurand
Robert Ozanne
Julien Carette
Elmire Vautier
Lina Darwils
Claude Sainval
Raymone
Jean Joffre
Lise Courbet
Marcel Simon
Georges Bever
Georges Malkine
Rivers Cadet
Franck Maurice
Robert Moor
Jean Wiener
Yves Mirande
Roger Doucet
Hélène Flouest
Henri Nassiet