Just out of prison, ex-con Ugo Piazza meets his former employer, a psychopathic gangster Rocco who enjoys sick violence and torture. Both the gangsters and the police believe Ugo has hidden $300,000 that should have gone to an American drug syndicate boss. Caliber 9 is the first part in Di Leo's "Milieu" Trilogy of poliziotteschi films. It was followed by "The Italian Connection" (1972) and "The Boss" (1973).
Mino and Lello, two sons of a worker wrongly accused of murder, try to find out evidence of his innocence and begin to investigate mafia business in Torino.
Major Bower’s wife tells her lover Chaliko where her father’s fortune is hidden. When the major finds out he murders her and with his gang, goes after Chaliko.
