An undercover policeman infiltrates a criminal gang.

Rossano Brazzi
as Lt. Mario Grandi

Lea Padovani
as Anna Silvestri

Maria Frau
as Franca

Jacques Sernas
as Aldo

Franca Tamantini
as Wilma

Cesare Fantoni
as Max Kruger

Fedele Gentile
as Commissario di polizia

Elio Armand
as Toni

Enzo Fiermonte
as Carmelo Improta

Evar Maran
as Aldo Silvestri