Amzot is being bombarded by the planet Luvanuum. Zaygot and his henchmen are trying to destroy Azmot. The Herculoids travel to Luvanuum in a ship captured from Sarco. When they land, their ship is destroyed and they are attacked by winged sentries with deadly laser beams. The Herculoids destroy Zaygot's base and he escapes - they use Zaygot's ship to return to Amzot.