A black-out occurs during the meeting of a gang of criminals. When the light is back one of them is found killed with a stab on his back and all the clues point to a penniless man who had an argument with the victim a short time before the murder.
Tomas Milian
as Nico Giraldi
Marina Ripa di Meana
as Eleonora Ruffini
Roberta Manfredi
as Angela Santi
Alberto Farnese
as Manfredo Ruffini
Massimo Vanni
as Brigadier Gargiulo
Enzo Liberti
as Otello 'Er Pinna' Santi
Marino Masé
as Enzo Nardelli
Angelo Pellegrino
as Procurator Luciano Canuti
Enrico Luzi
as Moretti
Renato Mori
as Police Commissioner Galbiati
Leo Gavero
as Judge Laurenzi
Bombolo
as Venticello
