Universal Century 0068, Side 3 - The Autonomous Republic of Munzo. Zeon Zum Deikun attempts to declare complete independence of Munzo from the Earth Federation Government, while he preaches the evolutionary potential of humans who have advanced into outer space. Deikun however suddenly falls to his death in the middle of his speech at parliament. Upon Deikun's death, Jimba Ral spreads word of a House of Zabi conspiracy - but despite such efforts the power and sphere of influence of House of Zabi, led by Degwin Sodo Zabi, only seem to escalate. While we witness for the first time the untold convulsions of Universal Century history, Casval and Artesia, just bereaved of their father, must face destinies which will be just as tumultuous as the very era itself.

Universal Century 0074. Since leaving Texas Colony, Édouard Mass has camouflaged his identity and enrolled in the Autonomous Republic of Zeon's Space Defense Military Academy under the name of Char Aznable. He develops a friendship with his classmate Garma, a scion of the Zabi family. Gradually the two become admired by the other students. Then, in Universal Century 0077, the young at last rise up in arms and begin the fight for independence against the Earth Federation's security forces. This rebellion, however, also marks the beginning of Char’s spectacular scenario of revenge… Now, the gears of history are turning!

Universal Century 0079. Humanity has turned even space itself into a battlefield, and the Principality of Zeon forces advance after wiping out half the world's population by carrying out the Operation British (colony drop). In response, the Earth Federation Forces mobilize their overwhelming fighting strength to regain the advantage. The complex intrigues of the Zabi family... Sayla Mass, as she contends with the whims of fate... Hamon and Ramba Ral, who is now a pilot in the Zeon forces... Amuro and Fraw, leading peaceful lives at Side 7... a dark shadow falls across them all. And the Zeon ace Char Aznable, driven by revenge, goes into action as the "Battle of Loum" finally begins.

Following the success of the Dawn Rebellion, Degwin negotiates with Vice Admiral Revil to surrender all Federation assets and the complete withdrawal of Federation forces from Side 3 to prevent similar incidents from happening again. After bring reprimanded by Degwin for failure to look after Garma, Dozle sends Char - who motivated Garma into starting the rebellion - to Earth; in response, Char requests to become a mobile suit pilot when he returns. Feeling the burden of his responsibilities, Dozle proposes to cadet Zenna Mia. In the Earth city of Manaus, Char lands a job as a mobile worker pilot at a construction site. He meets a young Lalah Sune at a casino.

Advanced Generation (A.G.) 101. The space colony Angel is attacked and destroyed by a mysterious "Unknown Enemy" with overwhelming strength. As this "UE" continues its attacks, a boy named Flit Asuno loses his mother when she is caught in the crossfire. Now in A.G. 115, Flit must fight using a new Gundam of his own creation, which evolves itself through battle. The curtain rises on an epic Gundam saga spanning 100 years and three generations.

When Banagher Links meets the mysterious Audrey Burne, he inherits the Unicorn Gundam and is swept up into the battle for space colony independence.

High-school student Amate Yuzuriha lives peacefully in a space colony floating in outer space. But when she meets a war refugee named Nyaan, Amate is drawn into the illegal mobile suit dueling sport known as Clan Battle.

Cosmic Era 71. Mankind has developed into two subspecies: Naturals, who reside on Earth, and Coordinators, genetically enhanced humans capable of withstanding the rigors of space who inhabit orbital colonies known as PLANTs. The story revolves around a young Coordinator named Kira Yamato, who becomes involved in the war between the two races after a neutral space colony secretly developing mobile suits for the Earth Alliance is attacked by the PLANTs' military force, ZAFT.

It is the Universal Century, year 0153. The Zanscare Empire, which rules almost all of Side 2, has declared its independence from the old government, the hollow and corrupt Earth Federation. Under the justification of creating a new, space-based order, it has begun an invasion of Earth; and Point Kasarelia, the illegal residence area in Eastern Europe where Üso Ewin and Shahkti Kareen live, is no exception. As they are caught in the fighting between Zanscare and the opposing resistance organization, the League Militaire, fate draws Üso and his friends into the midst of battle.

U.C. 0097, one year after the opening of "Laplace's Box". Despite the revelation of the Universal Century Charter that acknowledges the existence and rights of Newtypes, the framework of the world has not been greatly altered. The conflict later dubbed the "Laplace Incident" is thought to have ended with the downfall of the Neo Zeon remnants known as the Sleeves. In its final battle, two full psycho-frame mobile suits displayed power beyond human understanding. The white unicorn and the black lion were sealed away to remove this danger from people's consciousness, and they should now be completely forgotten. However, the RX-0 Unicorn Gundam 03, which disappeared two years earlier, is now about to show itself in the Earth Sphere once more. A golden phoenix… named Phenex.