Hercules comes from Greece to Ravenna, Italy, because a friend from childhood days has sent for him: Hercules should help the Roman Emperor who is in danger because of an intrigue lead by the leader of the pretorian guards.
Physicist Theodore Heldt, his young daughter Fern and his assistant Larry Gordon, on board a ship for a scientific expedition, are shipwrecked in the Pacific Ocean after a terrible storm. They find themselves safe and sound on an exotic desert island paradise. Several years pass, the professor dies and Fern and Larry, long in love and alone in the world, are united. One day, the ship they'd been waiting for appears, but the sailors are three smugglers who, instead of representing salvation, pose a threat to the young couple.
Released from prison, Arlette returns to her job as a cabaret star. The police try to get her to confess where the stolen jewels are hidden.
Taking advantage of the shooting of a film, gangsters stage a hold -up. A black man, Selim, is unfairly accused.
Anika is the most beautiful girl of her clan and has for pretenders the gypsy Sandor and the rich Féry. When Féry is assassinated, Sandor is accused of the murder. Anika, with the help of a fortune teller decides to find out what happened.
