Attila, the leader of the barbarian Huns and called by the Romans "The Scourge of God", sweeps onto the Italian peninsula, defeating all of the armies of Rome, until he and his men reach the gates of the city itself.

In this melange of characters and events from separate mythological stories, Hercules, demigod and superman, arrives in the ancient Greek kingdom of Iolcus to tutor Iphitus, son of king Pelias; immediately on arrival, he falls in love with the king's delectable, briefly clad daughter Iole. Before he can win her, he must succeed in a series of quests, in the course of which he teams up with Jason, true heir of Iolcus, whom he accompanies on the famous voyage of the Argonauts.

In a castle, some actors are guests of a duke. It happens that a precious chastity belt, family heritage, disappears by a thief.