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 Milianas Nico Giraldi
Marina Ripa di Meanaas Eleonora Ruffini
Roberta Manfredias Angela Santi
Alberto Farneseas Manfredo Ruffini
Massimo Vannias Brigadier Gargiulo
Enzo Libertias Otello 'Er Pinna' Santi
Marino Maséas Enzo Nardelli
Angelo Pellegrinoas Procurator Luciano Canuti
Renato Morias Police Commissioner Galbiati