Comic dubbing turns the quest for a magical helmet in ancient Greece into a laugh riot.

In ancient times, Cadmus, King of Thebes, destroys Jove's temple and proclaims himself head god. Crios, strongest and most clever of the Titans, is sent by Jove to Thebes to right matters. In return he will be given the freedom of his brothers imprisoned in the infernal regions. After Crios defeats a huge Negro, Rator, in the arena, both he and Rator are freed. Later, Crios meets and falls in love with Cadmus' daughter, Antiope, and steals Pluto's helmet, which renders its wearer invisible at night. He then rescues the exiled Antiope and slays the Gorgon put there to guard her; as he is about to be captured by Cadmus' men, his brother Titans, freed by Jove, appear and disperse the soldiers. Meanwhile, at a victory celebration in Thebes, Rator is dragged in to be executed in the arena, and the statues there come to life, turning out to be the Titans, who attack the guards. However, the king's men are made invulnerable by dragon's blood until Crios floods the passages, thereby washing the blood away and enabling the Titans to defeat the tyrant's soldiers. Crios rescues Antiope, hurls a thunderbolt which fells Cadmus, and frees the Titans and the Thebans.