In 2307 AD, the earth's fossil fuels were exhausted. After nearly half a century of construction, a solar power generation system with a total length of 50,000 kilometers and centered on three orbital elevators was built. In order to build this huge building that can generate semi-permanent energy, the world formed three huge national alliances: the "World Economic Union" centered on the United States, commonly known as the UNION; the "Human Innovation Union" centered on China, Russia, and India; and the New European Community AEU. Because the orbital elevators are too large, defense has become a very difficult task. However, the armies of various countries are still engaged in a large-scale zero-sum game (competition in which no one party benefits) for their own prestige and prosperity. In this world, an organization that wants to put an end to it appears - the "Amanto" private armed organization with mobile suits Gundam. In order to eliminate the disputes in the world, they launched a combat operation that transcends ethnicity, country, and religion. Gundam pilot Setsuna F. Kiyohide is determined to change this world.