It is the year 0083 of the Universal Century. The rebellious Principality of Zeon has been defeated in the One Year War by the Earth Federation. However, a faction of Zeon remnants led by Aguille Delaz fled from the final battle, hiding themselves away. After three long years, they attempt to rise up once more, sending Delaz's ace pilot, Anavel Gato, to infiltrate a Federation research base to steal one of two secretly developed prototype Gundams along with its deadly nuclear warhead. Threatened by the rogue Gundam suit and seeking to retain peace, the Earth Federation mobilizes the newly developed Albion carrier to recover the stolen unit. Manned by the remaining test pilots, with rookie pilot Kou Uraki piloting the remaining prototype Gundam, the Albion and her crew are determined to stop Gato, retake the stolen Gundam, and prevent the Zeon remnants from starting another war. [Written by MAL Rewrite]

In the year Cosmic Era 0071, the space colony Heliopolis remains neutral in the great war raging across the galaxy between Coordinators, human beings whose biological traits have been altered before birth, and Naturals, unaltered people who remain on the planet Earth-datcha. The Naturals' deep hatred of the Coordinators drove the advanced beings into space, seeking shelter in man-made colonies-datcha. Kira Yamato is a Coordinator and university student on Heliopolis, when his life is thrown into disarray as ZAFT, the military organization composed of rebellious Coordinators, attacks the colony in an effort to steal a set of five state-of-the-art military mobile suits known as Gundams-datcha. While ZAFT manages to make off with four of the mobile suits, Kira take control of the final Gundam, the Strike-datcha. Surviving the battle, Kira and his college friends join the crew of the Archangel, a ship run by the Earth Alliance, and the young soldiers experience the horrors of war and the loss that comes with it-datcha. [Written by MAL Rewrite]

In the year Cosmic Era 0071, a wartime brawl between two mobile suits results in the destruction of a neutral country. Shinn Asuka finds his entire family killed as casualties of the violence, and swears his life toward a vengeful pursuit of the Earth's Natural forces, under the impression they were the ones responsible for his family's death. Shinn works his way up through the ZAFT military forces, eventually gaining access to the cockpit of the prototype Impulse mobile suit. Athrun Zala, a veteran of the recent war employed in the service of diplomat Cagalli Yula Athha, finds himself drawn into a new conflict between the Naturals and the Coordinators: human beings artificially enhanced before birth and hated by the Naturals for their biological advantages. As the new war rears its head and violence becomes inevitable, Athrun finds himself as a mentor to the bitter Shinn. Athrun must steer the young pilot towards a mindset of mercy before his rage and desire for vengeance consumes him. [Written by MAL Rewrite]

In the year Future Century 0060, the many countries that once comprised Earth's surface exist as separate colonies floating in space. Their home planet now uninhabitable, the ruler of all of the colonies is decided by their unanimous participation in the intergalactic Gundam Fight Tournament—a series of battles between the champions of each colony to determine who is most fit to reign over them all. Neo-Japan's champion is Domon Kasshu, a man who accepts the role with some ulterior motives. Domon searches the galaxy for his brother, a criminal who allegedly murdered their mother and made off with the Devil Gundam, a highly advanced weapon with the power to unleash mass destruction across the galaxy. In his quest to bring his sibling to justice, Domon travels from colony to colony, meeting many of the fighters who will become his allies and enemies in the forthcoming Gundam Fight Tournament. Armed with the strength of the Shining Gundam, Domon battles to uncover the truth behind his tortured childhood, suffering great betrayal and crushing blows on his quest toward personal and national triumph. [Written by MAL Rewrite]