Princess Marina leaves Azadistan and begins a worldwide diplomatic tour to seek help for her impoverished nation.

In Earth orbit, Sergei's mobile suit team continues its attack on the Ptolemaios and the Gundam Meisters. While Setsuna and Lockon defend their mothership, Allelujah and Tieria find themselves caught in the enemy's trap.

The Union, Human Reform League, and AEU begin their joint military exercise in the Taklamakan Desert.

A mysterious benefactor has provided the three superpower blocs with a new weapon against the Gundams. Quickly establishing a military alliance, the superpowers organize an elite fighting force under the aegis of the United Nations.

The Celestial Being mothership Ptolemaios has been destroyed, and most of the Gundams are beyond repair. Yet Setsuna continues his desperate fight against the overwhelming power of Alejandro Corner's mobile armor and the final weapon hidden within it.

Having been rescued from near defeat by the Katharon resistance group, the Ptolemaios 2 now takes refuge at a Katharon base in the Arabian desert.

Tieria is shocked at the sudden appearance of his lookalike Regene Regetta. He is further disturbed by Regene's revelations about the Innovators.

The Ptolemaios 2, damaged by the Innovators' attack, descends to Earth. Now separated from his comrades, Setsuna searches for the Ptolemaios 2. But instead, he finds Ali al-Saachez and his Arche Gundam waiting for him.

The Ptolemaios 2 has received a message containing coordinates for a point at Lagrange 5. The crew are suspicious, but Setsuna suggests they set course for this mysterious location.