Claude Brasseur, Gabrielle Lazure, Jean-Claude Brialy, Jean-Louis Trintignant, Dayle Haddon, Robert Hirsch, Jacques Dacqmine, Daniel Jégou, Luc-Antoine Diquéro, Yves Beneyton, Jacques Bondoux
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.