In the year 2311 AD, a world that once saw itself full of inter-continental conflict now stands unified, led by the Earth Sphere Federation (ESF). The ESF established a preventative military task force known as the A-Laws, tasking them with shutting down violent terrorist organizations. As they gain more and more legal authority, the A-Laws begin to twist the law to fit their own agenda, ruling the citizens of Earth with a heavy hand. In response to the fascistic behavior of the A-Laws, the anti-terrorist group Celestial Being reappears. Led by state-of-the-art mobile suits known as Gundam, the pilots of Celestial Being wage a new war with the A-Laws, aiming to stop their tyrannical abuse of power. Setsuna F. Seiei, pilot of the Gundam Exia, helps to lead the charge along with his fellow Gundam Meisters Lockon Stratos, Allelujah Haptism, and Tieria Erde. But in the process, Setsuna stumbles upon a conspiratorial plot spearheaded by a new faction, the Innovators, and must contend with his own old wounds and ghosts of the past in order to save a world that despises him.

After foiling a world-threatening plot, Shigeo Mob Kageyama returns to tackle the more exhausting aspects of his mundane life—starting with filling out his school's nerve-racking career form. Meanwhile, he continues to assist his mentor Arataka Reigen and the office's new recruit, Katsuya Serizawa, in solving paranormal cases of their clients. While continuing his duties, Mob also works on gaining more independence in his esper and human lives, as well as trying to integrate better with the people around him. However, new supernatural and ordinary challenges test Mob’s emotional stability and force him to confront the realities around him. As he strives to continue forward on the path to maturity, Mob must resolve his emotional crises and reassess the naivety he has held on for so long.

Tekkadan has now become a direct affiliate of Teiwaz after procuring a new trade agreement with Arbrau. With its newfound funds and prestige, Tekkadan finds both its list of allies and enemies growing. Meanwhile, the flames of the Gjallarhorn power struggle continue to rage in full force. As a part of her efforts to make Mars financially independent from Earth, Kudelia Aina Bernstein founds the Admoss Company and enlists Tekkadan as her business partner. The stakes are getting higher as the Tekkadan family continues to grow. Will Orga, Mikazuki, and the rest of the Tekkadan faction be able to keep up, or will Kudelia's dream of Martian independence die out?

In the distant future, mankind's dependence on fossil fuels will lead to their complete depletion, an energy crisis unlike anything the world witnessed. Out of retaliation and fear, humanity began focusing at an alternative source of energy: solar power. Different nations have united together to form three major factions—the Union of Solar Energy and Free Nations, the Advanced European Union, and the Human Reform League. Each of these sectors has access to a solar power generator, which gives them limitless energy. As a result, countries that were once dependent on the sale of fossil fuels are now plunged in poverty, leading to years of warfare and internal strife over the control of solar energy. Amid this chaos, an unknown paramilitary organization appeared identifying themselves as Celestial Being, aspire to end all warfare through armed intervention by using mysterious and technologically advanced Mobile Suits known as Gundams. Mobile Suit Gundam 00 follows the story of Celestial Being's Gundam Meisters Setsuna F. Seiei, Lockon Stratos, Allelujah Haptism, and Tieria Erde. These four dive into the devastating battle between the three superpowers to accomplish their goal of changing the world.