The city suffers and succumbs unarmed, but an ex secret agent succeeds in winning the struggle against the gangsterism. Intrigue and violence grip a society victim of the crime.

A bankrupt Italian count commit suicide and one of his creditors takes over his family villa but he allows the widow, the mother, and the three adult sisters to stay on. The creditor is a wealthy businessman, but also basically an uncouth peasant (who fancies himself an opera singer). Still, the dimwitted, sex-crazed sisters try to seduce both him and his shy, virginal son who accompanies him.

Countess Elena marries the charming Guido Rambaldi, only for him to be seduced by dancer Nara during their Venice honeymoon.