A taxi driver works as a freelance callboy and is passed around among the circle of acquaintances of his first customer.

Franco Sereni, a captain of carabiniers, is dismissed from service for being the proponent of "the law of the gun". He is asked to hold a private investigation of several cases of blackmailing wealthy women. Soon Sereni finds out that there is much more then just blackmailing.

Convict Roberto murders a guard and escapes from jail with his cellmate. Once free he joins a group of gangsters and becomes a professional hitman. The gang abduct a young woman and when one them attacks her, Roberto shoots him and takes her to an abandoned farm house…..

Two thugs take 15 people hostage and demand a ransom from the authorities million dollars in gold, a car and a plane to get out of the country.

Paolo, a youth, associates with very dubious characters and shirks work but all in all he is a good guy. Will he mend his own ways?