In 2086, two opposing factions design an anti-radiation suit to counter the nuclear threat. A nuclear war is then unleashed and humanity fails to disappear. Several centuries later, the descendants of the survivors live in peace in a way of life close to the cavemen. But one day, an extra-terrestrial force from a volcano housing a former military base attacks the inhabitants of this new world in order to reduce them to slavery. In front of the power of the invaders, the Ancients of the tribes then reveal to the most brave of the warriors the secret parchments concerning the legend of the sacred armor of Antiriad. It will have to use it to destroy the energy supply center of the extra-terrestrial forces.