A tale of the complicated Neapolitan lives and loves of Maria and Alberto; her smuggling father Don Gennaro and some espionage.
Thanks to wartime smuggling Gioconda Perfetti, a roman fruit vendor, becomes very rich. She leaves her shop and moves to a magnificent villa which once belonged to a count. She also becomes involved with some very dubious characters who profit from her ignorance and cheat her out of her money.
Maciste takes advantage again of a break of acting in order to wash away injustice and castigate the wicked, this time in the name of dynastic legitimacy. Otis, the prince of Sirdagna kingdom, lives undercover in a foreign land, waiting to ascend the throne; Stanos the evil ruler though, is willing to do anything in order to prevent the legitimate prince installation. The court is a dangerous place, Otis is young and naïf: in order to solve the situation, Maciste, following the advice of his friend Saetta, temporarily takes Otis’s place, and presents himself as the legitimate prince. The crowd, enamored by his good looks, applauds him immediately as the emperor.
Cretinetti is about to get married and he could not be any happier and more in love with his Junoesque consort. But just on the day of his wedding, he reads a notice on the wall explaining how to behave in the case of an enemy air raid. The fear that grips him makes him even too literal in implementing safety indications, causing trouble and accidents that will not only stop him from enjoying his first marital night, but will even cause the collapse of the whole house. In the end, the gendarmes go to him with a conscription notice and take him away under coercion, under the appalled gaze of his new bride.