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
Bombolo
as Venticello
Angelo Pellegrino
as Canuti
Roberta Manfredi
as Angela Santi
Maurizio Gueli
as Bonardi
Marino Masé
as Nardelli
Enzo Liberti
as Er Pinna
Enrico Luzi
as ingegner Moretti
Alberto Farnese
as Manfredo Ruffini
Massimo Vanni
as brigadiere Gargiulo
Sergio Sinceri
as Amedeo Secchi
