A young girl, pursued by a band of conspirators, hides in a movie theatre where she watches the film Cabiria. She determines to seek the aid of that film's strongman, Maciste. When she locates him, he helps her overcome her enemies, but not without many thrilling and dangerous adventures.

Menelaus is the king of Sparta and temporarily departs from his residence, leaving Helen, the queen of Sparta, without him. When Paris of Troy, ambassador and son of the king, arrives in Sparta, he kidnaps Helen and brings her to Troy where the two fall in love. The Greeks attempt to siege the city walls of Troy, but fail. The Greeks then place a huge wooden Trojan horse with Greek warriors hidden inside under the walls of Troy, pretending to be dedicated to the gods and ending the war. Falling for the trap, the Trojans break down the city walls to bring the wooden horse inside.

Maciste, for the first time, suddenly discovers to be in love. The object of his love is Ada, the daughter of Thompson, an enlightened industrialist persecuted by Bethel, a competitor without scruples. He first makes use of a small group of agitators in order to foment the workers, then he tries to affect his loved ones, kidnapping his daughter. But he hasn’t squared things up with Maciste. In Maciste innamorato private and politic life interlace and condition each other. Maciste, a new popular hero, acts in advance of his time and sees himself as a media idol: after punishing the instigators, the crowd will recognize him as a movie star and promptly forget their claims carrying him shoulder-high. A hero, though, doomed to an unhappy love.

The most explosive and surreal episode of the Maciste series in which we see the hero up against the hardships of the average man: stress, women and cars. The Itala studios are in a disorderly state, the crew watches Maciste in the courtyard as he happily darts around in his new car, a single seater renamed Diattolina in honor of the car maker Diatto, the film’s “sponsor”. Maciste is happy; he caresses the car and talks about his vehicle as if it were his bride. The only thing missing is the honeymoon. But peace and tranquility are not easy to come by: in every corner of the country Maciste is recognized as a generous film star. Waiters, salesmen, passersby and little kids: everyone has a problem for him. Who said something about relaxing? An abandoned castle looks like a peaceful place, but Maciste has not met the wild American girl hiding in the cellar…