Four years have passed since the final battle between Celestial Being and the UN and the establishment of the Earth Federation. The federation has established a secondary military comprised of its elites, known as the A-Laws. This organizations mission is to use military force to maintain the peace. After several massacres Setsuna f Seiei can no longer stand by and watch as the peace he fought for hangs in the balance. Once again he powers up his gundam to fight for ever lasting peace.