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, who have been forced to abandon their supply base and can now only flee before the enemy's superior numbers. The mercenary soldier Ali al-Saachez approaches the Trinity siblings, presenting himself as an ally, but his true mission is one of assassination. The Ptolemaios crew are still recovering from their own battle with the UN forces, and Lockon has been partially blinded. But Setsuna is determined to return to Earth and observe the situation for himself. He arrives to find al-Saachez in the process of eliminating Team Trinity with a stolen Gundam Throne, and Setsuna confronts his old nemesis in a ferocious duel of Gundams.