A city neighborhood is frightened by a strangler and a voyeur. The police detectives, headed by Léopold Latour, are not very efficient in their investigations, though detective Édouard Lambert does a little sleuthing on his own.

Marie Tifo
as Marie-Josée

Jean-Marie Lemieux
as Léopold Latour

Pierre Curzi
as Bertrand Houle

Raymond Bouchard
as Édouard Lambert

Denise Proulx
as Mme Noreau

Pierrette Robitaille
as Colette

Rémy Girard
as Henri-Paul

Gaston Lepage
as Lucien

Micheline Bernard
as Catherine Rondeau

Jean-René Ouellet
as Louis