A well-known business lawyer is shot dead in the courthouse. A commissioner of the Criminal Brigade is in charge of the investigation and is helped by a journalist.
Claude Brasseur
as Commissaire Martin Griffon
Gabrielle Lazure
as Sybille Berger
Jean-Claude Brialy
as Le contrôleur Jean-François Rambert
Jean-Louis Trintignant
as Christian Lacassagne
Dayle Haddon
as Suzy Thomson, alias D'Annunzio
Robert Hirsch
as Avram Kazavian
Jacques Dacqmine
as Me Antoine d'Alins
Daniel Jégou
as Philippe d'Alins
Luc-Antoine Diquéro
as Antoine Gomez
Yves Beneyton
as Millard, le directeur du ministre de l'Intérieur
Jacques Bondoux
as Un observateur
