Storyline
The show is set in a futuristic universe, controlled by a few races or "tribes" that possess the capabilities for interstellar travel. The universe had once been ruled by a "Golden Tribe" (黄金の種族 Ougon no Shuzoku), who had since left the current galaxy long ago; they passed on their knowledge to the humanoid "Silver Tribe" (銀の種族), the insectoid "Bronze Tribe" (青銅の種族), and the gigantic "Heroic Tribe" (英雄の種族). The latter was later punished by the Golden Tribe for causing havoc in the universe and made to serve the other tribes as 'Nodos' (ノドス) - extremely powerful beings that play a key role in the story. Before the Golden Tribe departed, Humanity answered the call of the Golden Tribe and was dubbed the "Iron Tribe" (鉄の種族). Viewed as a threat to the order of things, the Silver Tribe decided to annihilate the Iron Tribe with the aid of the Bronze Tribe. However, humanity survived their assault on Earth and scattered their numbers across the stars to preserve their race.
The story follows the voyages of the starship Argonaut and its crew to find a means to bring peace to the universe. The ship carries the young human clairvoyant princess Dhianeila, who is on a mission to find the mythical savior of the human race. This savior is expected to aid humanity in their war against the Silver and Bronze tribes, who are bent on humanity's extermination.
Initially, the expedition finds a child-hearted boy called Age on a partially destroyed planet. When the Argonaut is attacked by the Bronze tribe, Age is shown to transform into a "Nodos" form, Bellcross, a gigantic and immensely powerful being. He easily fends off the superior attacking force. Having found their messiah, the Argonaut starts its way back to Dhianeila's home world, Duey. During their journey home, the Silver Tribe launches several attacks on the Argonaut to prevent the ship from returning to their home world, but Age always manages to stop them.
During the many attacks on the Argonaut, the crew begins to warm up to Age, they had been fearful of his powers as a Nodos. The Silver tribesman Phaetho O assigns himself the role of "testing" Age, destroying the Argonaut and all the Iron Tribe on it. After Age drives Phaetho O away and saves his tribe, they all begin to accept him. Iolaous Oz Mehelim of the Yunos knights is jealous of Age but warms up to him after the attack on Titarros. Once they escape the battle against Phaetho O at Titarros, the Argonaut crew arrives near the Cemetery belt where they are again attacked by Phaetho O and the Bronze Tribe accompanying him. Here, Age fights another Nodos who had visited him on Titarros. During the fight, the Argonaut manages to escape; however, to do so, Age had to stay behind to fight. The Argonaut warps to what they think is an unoccupied place and ends up running into stragglers from the Bronze Tribe. Rather than fight, they attempt to run, only to be cornered by an enormous fleet. The fleet is also Iron Tribe, after saving the Argonaut that fleet accompanies them and they leave to help Age.
After reaching back to Duey, word had spread throughout humanity of the Argonaut's success, and Dhianeila's brothers used the momentum to successfully convince humanity to launch a counter-offensive against the Silver and Bronze Tribes. With humanity united under the Junos family, the Silver Tribe throws the full might of their forces, along with their 4 Nodos's to destroy humanity. As the fighting intensifies, the humans move towards the Golden Tribes' old home world. At the last moment, contact is made between the Silver Tribe, humanity, and the Nodos of each side. Dhianeila brings the Silver Tribe to accept a ceasefire, and Age is shown to be the "key" to opening a portal to the universe into which the Golden Tribe has moved.
When this portal is opened, the Silver Tribe moves on to this other universe and passes all of its knowledge to humanity, including the ability to control the Bronze Tribe. However, during the battle, Age is missing after he opened the gateway; some believed he died in the process, while others believed he would return one day. Honoring Age's wish, Dhianeila dedicated the next few years of her life to restoring Age's home planet.
Four years later, Humanity has now brought order throughout the universe. With the Silver Tribe's technology, humanity had advanced further and rebuilt Earth. Dhianeila and the Argonauts' team have succeeded in restoring Age's home, but through it all, she missed Age the most. Just as she was about to leave the only planet that gave her some comfort, the Golden Tribe's gateway opened and revealed that Age was alive, and he and Dhianeila were reunited.
