Having recently moved into her new apartment, Irène Cazenave, the widow of a well-known police officer, is forced by one of her husband's colleagues to take part in an investigation. The building's provocative concierge has been found murdered. We watch a parade of suspects, only to learn at the end that Irène killed the janitor under blackmail. She kills herself.
as L'inspecteur principal Marc Brénot
as Irène Cazenave
as Le professeur Kieffer
as M. Boulay, l'épicier libidineux
as La vieille Madame Vignot
as Merle, l'adjoint de l'inspecteur
as Martin, le masseur
as Catherine
as José "Jo" Kieffer
as Mme Boulay, l'épicière
as Le concierge
as La buraliste
