A suburban American woman inherits her grandfather’s Mafia empire and, guided by the Firm’s trusted consigliere, defies everyone’s expectations, including her own, as the new head of the family business.

Two crime families battle for supremacy in 1929 Chicago in this Italian crime spoof. One group, known as the "Sons of Mammasantissima" thereby professes its (ironic) dedication to the Virgin Mother. The other family works undercover from a Salvation Army soup kitchen. Neither family seems capable of accomplishing anything of note until a wily Sicilian arrives on the scene and sorts things out.

Cliff works as a narcotics investigator for the police and infiltrate a mafia gang. Soon it turns out that Cliff has bigger plans than just to bust bad guys.