The year is 2307 A.D. Although fossil fuels have been depleted, humanity has obtained a new source of energy to replace them in the form of a large-scale solar power generation system based on three huge orbital elevators. However, the benefits of this system are available only to a handful of major powers and their allies. The three orbital elevators belong to three superpower blocs. These are the Union, led by the United States of America; the Human Reform League, led by China, Russia, and India; and the AEU, led by Europe. These superpower blocs continue to play a grand zero-sum game for the sake of their own prestige and prosperity. In this world of never-ending conflict, a private armed organization appears, dedicated to the elimination of war through armed force. Its name is Celestial Being, and it is in possession of "Gundam" mobile suits. With these Gundams, it begins armed intervention into all acts of war. Source: TRSI

In 1989, Kevin Flynn, the innovative software engineer and the CEO of ENCOM International, disappears. Twenty years later, his son, Sam, now ENCOM's controlling shareholder, takes little interest in the company besides an annual practical joke on the board of directors. Sam is visited by his father's friend, ENCOM executive Alan Bradley, urging Sam to investigate a mysterious page originating from Flynn's abandoned arcade. There, Sam discovers a concealed computer laboratory and unintentionally teleports himself to the Grid, a virtual reality created by his father.