Widow of a rich older man, Sonia returns to her old neighborhood, unable to claim his inheritance. As soon she arrives, she meets her old love Roberto and they revive their romance. But this love can not be due to Sonia's greed, who becomes the mistress of a handsome and wealthy gangster.

Machuchal as a federal agent. He presents his humorous adventures and exploits in the city of New York as Agent 0. The film is an extremely mild spoof of James Bondish-spy films.