Judau is revered by the Light tribe as their messiah, but his refusal to their leader Sarasa soon has him on the run. In order to change her sister's mind, Rasara and Judau try to get the old mobile suit Cattle operational. That's when Glemy attacks in the new mobile suit Bawoo.

Retells the story of Gundam and Mobile Suit Zeta Gundam.

Junk dealer Gemon Bajack comes to Mashymre Cello, promoting his self-built mobile suit "Geze." With two Gaza-Cs as escorts, Gemon heads out to attack the Argama. But on the way, he spots a giant "Z-G" drawn in a schoolyard by Shinta and Qum. Taking it as a written challenge from the Zeta Gundam, he changes course and heads for the school.

Deciding that he has no choice but to become more ruthless if he hopes to beat the Zeta Gundam, Mashymre Cello uses the new mobile suit Zssa to attack the residential area of the city. Concerned about the hospital where Kamille Bidan is being treated, Fa Yuiry intercepts it with the Methuss as Astonaige Medoz boards the Zeta, trying to prove that Judau Ashta isn't as special as the others think he is.

Losing their bearings in a debris cluster, the Argama docks at Moon-Moon, an old colony which has been forgotten by everyone. However, there the Argama is attacked by the mysterious Light tribe Taken captive, Judau seeks help from a beautiful girl named Rasara Moon.

Having been defeated by the Zeta Gundam, Mashymre Cello seizes an opportunity to strike back. As Judau Ashta and his friends search for the Argama, they happen to spot Mashymre launching into battle. Not wanting to be beaten to the prize, Judau grabs on to Mashymre's Galluss-J, hoping to stop it...

Fa worries about Kamille, whom they left behind on the colony. Beecha and Mondo send another message, prompting Mashymre to send Gottn to try and infiltrate the Argama and make contact with these collaborators. Judau sorties in the Zeta Gundam, but his beam rifle is still unplugged...

The Neo Zeon cruiser Endra docks at Shangri-La. Hoping to avoid conflict, Bright has the Argama retreat into the colony's interior. Just then, Judau successfully boards the Argama, hoping to take the Zeta Gundam for himself.

At last, Judau Ashta is a member of the Argama crew. A team of three Gaza-Ds attack, but Judau is away negotiating with the junk dealers association for clearance to open an industrial airlock hatch. They're saved from this tight spot by a core fighter flown by a girl named Roux Louka from the La Vie En Rose.

After sneaking into a meeting of the junk dealers association, Judau and his friends mistakenly signal that the ship can use the industrial airlock hatch to escape. Gemon and Yazan, piloting two Gezes, attack the Zeta Gundam, and the Endra has the Argama in its sights. But the hatch still isn't open...

Having finally departed Shangri-La, the Argama sets course for the La Vie En Rose. Chafing against Bright's command, Beecha and Mondo try to send a message that they're willing to sell out the Argama. Receiving their signal aboard the Endra, Mashymre sorties in the new mobile suit Hamma-Hamma.

En route to the La Vie En Rose, Judau and the others abandon their duty and begin salvaging the wreckage of a Zaku II. Feeling responsible for her brother's selfish behavior, Leina and Roux set out for the La Vie En Rose themselves. But when they're attacked by Chara, Leina is thrown out into space.

Leina is taken to Glemy Toto and held captive aboard the Endra. The now enraged Judau is confined to the Argama's mess hall, but escapes with Elle's help. The two of them launch in the Double Zeta and Gundam Mk-II to rescue Leina. But Gottn plans to use Leina as a hostage in order to defeat the Double Zeta.

Judau Ashta flies through a pile of space debris in a mini mobile suit looking for parts to salvage. He comes across a fully intact escape pod and takes it back to Side 1 with him. There he meets up with his friends Lino Abbav, Elle Vianno, Beecha Oleg and Mondo Agake. They figure that they could get a good deal from the escape pod but when Judau decides to open it Yazan (who should be dead after Camille's fiery beam saber attack) jumps outs and takes Beecha hostage. Yazan asks for clothes so Judau goes and gets some from his house. His sister Leina questions him but he leaves to return to the others.

Now a prisoner aboard the Argama, Gottn takes Iino hostage and escapes. Chara Soon attacks in the mobile suit R-Jarja. Just then, under Roux's guidance, the core fighter, Core Top, and Core Base begin to transform and combine. The new mobile suit Double Zeta Gundam is born!

After the conflict in the Moon-Moon colony the Argama must once again dock with the La Vie en Rose for repairs. Emary reveals her feelings to Bright, who kindly lets her down and Judau tries to raise everyone’s spirit with a speech on how everyone must come together as a team, but is interrupted and punched by Elle for labeling Beecha and Mondo as traitors.

Having taken Shinta hostage during the test of their improved main cannon, Chara steals the Core Top and flees the Argama. When Judau and the others fly out to intercept her, they find themselves facing Gottn in his new mobile suit AMX-008 Ga-Zowmn and a squad of Gaza-Cs. Judau attempts to try and retrieve the Core Top by forcibly docking his core fighter with it.

Returning from Axis, the Argama docks at Granada on the moon to resupply. Judau, Elle, Torres, and Milly head out into Granada city, where Torres runs into Cecilia, a fried of his from childhood. But then Judau witnesses Cecilia making contact with Gottn.

Heading for Side 3, the Nahel Argama rescues an old civilian transport being attacked by Zakus. Aboard the old transport is Sarasa and Rasara of the Light tribe. However, among the civilian refugees aboard are Neo Zeon soldiers and Haman in disguise, having secreted herself into the crowd in order to make contact with Judau.

Hoping to rescue Leina, Judau hides in a dummy meteor and infiltrates Axis. There, he meets a young girl calling herself Elpeo Ple. Meanwhile, having given Glemy the slip, Leina meets up with Beecha and Mondo, who have managed to get away from Gottn. Together, they try to escape from Axis.

The Nahel Argama draws near to the Neo Zeon stronghold of Side 3. Heading to resupply them, Emary aboard the La Vie en Rose carelessly sends out an optical signal that gives away their position. This is picked up by the 3-D unit, subordinates of Mashymre piloting the new mobile armor Jamru Fin, who launch an attack.

The Nahel Argama docks at the neutral colony Tigerbaum, which is controlled by the influential Stampa Halloi. Stampa takes Elle, Rasara, and other girls he likes for his harem. Judau and Iino disguise themselves as girls in order to infiltrate Stampa's estate and rescue them.

Sensing Haman's evil mind, Sarasa and Rasara go into the colony with Mondo. But along the way, Stampa's Z'gok appears, and Rasara sacrifices herself to protect Mondo. Thinking that Haman was behind it, Judau marches into Stampa's estate.

Pretending to surrender with the Double Zeta as an offering, Judau once again goes to Axis. But Glemy, thinking that Judau and Roux are in a relationship, has Judau imprisoned. Judau tricks Ple into letting him go, but the angry Elpeo Ple takes Leina back and then flies off in pursuit in the Qubeley Mk-II.

Leaving the Argama on Earth, the crew returns to space in a shuttle to find the La Vie en Rose waiting with the new battleship Nahel Argama. But Judau and the others refuse when the kids are ordered off the ship. At that moment, they fall under surprise attack by Illia Pazom, a female soldier who has pledged her life to Mashymre.