At a testing ground, the AEU is demonstrating its new Enact mobile suit. Suddenly, a white mobile suit descends from the sky and swiftly destroys the Enact. This intruder is the Gundam Exia, and this marks the start of Celestial Being's first mission.

Celestial Being's activities have reduced the level of conflict in the world, but there are some who do not welcome this change.

In the aftermath of the orbital battle, the Human Reform League's scientists realize that one of the Gundam Meisters is actually a former test subject of their own Superhuman Institute.

On the brink of defeat, the Gundam Meisters have been rescued by the intervention of Celestial Being's second team. Their rescuers identify themselves as Johann, Michael, and Nena Trinity, the Meisters of the mysterious Gundam Thrones.

The United Nations reveals the existence of the GN-X to the world, and announces the launch of a Gundam elimination operation with the code name "Fallen Angels." The operation begins with the renewed pursuit of Team Trinity.

With the reappearance of Celestial Being, the A-LAWS begin gathering personnel who have experience fighting the Gundams.

While Ian Vashti and his fellow Celestial Being mechanics prepare the O Raiser, a support machine for Setsuna's 00 Gundam, the A-LAWS deploy a devastating new weapon of their own.

The A-LAWS have abruptly retreated after receiving word of a coup d'etat within the Federation. Hoping to reunite with his comrades, Setsuna sets the 00 on a course for Africa.