Duchess Patrizia is determined to marry, although against her will, effeminate but powerful Prince Stefano. This is the only way she has found to thwart the plans of Count Keller, her aggressive neighbor, who wants to grab her land.

An undercover policeman infiltrates a criminal gang.

Armando Conforti, his family and his friends have a business: they sell souvenirs near St. Peter's, in Rome, they change dollars, in short they get along.

Giallo from 1962