In a future where fossil fuels are nearly depleted, humanity turns to solar power as a new energy source, leading to a global conflict. Three powerful factions emerge—the Union of Solar Energy and Free Nations, the Advanced European Union, and the Human Reform League—each possessing a solar power generator. As nations struggle with poverty and warfare over energy control, a mysterious group called Celestial Being intervenes with advanced Mobile Suits called Gundams to end all conflicts. Follow Gundam Meisters Setsuna F. Seiei, Lockon Stratos, Allelujah Haptism, and Tieria Erde as they navigate the chaos and strive to reshape the world.