The two drivers Giovanni and Gaetano are friends. Gaetano, bold and ruthless, thrives in the black market, while Giovanni, who is a naive and fundamentally honest worker from the North of Italy, cannot get any profit and his wife, an energetic and talkative Roman woman, can't help blaming him for his poor business skills.
A cavalry officer is framed for the murder of a fellow officer and cashiered out of the army. After he gets out of prison he vows to find the renegade who framed him and bring him to justice.
After robbing and murdering his married lover and then making her death look like suicide, conniving philanderer Ronnie Mason relocates to Los Angeles.