Kira, Dullindal, Shinn, and Athrun confront each other at ZAFT's mobile fortress Messiah, battling over the Destiny Plan whose introduction will determine the fate of humanity. Moment by moment, Messiah is drawing closer to Earth. Its guns are aimed at Orb, the only nation that opposes the Destiny Plan. With humanity's survival at stake, the battle to save its final hope, Orb, enters its last stage.

The fighting is concluded with a single gunshot. Its reverberating echo marks the end of the Destiny Plan. Those who have lived through the final battle witness the spread of both hope, and the darkness of chaos.

After the battle, Shinn once again descends to Earth. At a place in Orb whose memories he cannot forget, he has a fateful encounter. The name of the youth who stands before him is...