In 2079 the birth of the brainwave instrument BrainStation triggered the fourth industrial revolution. Mankind has ushered in a brand new era-the "virtual cyber age". Through the use of a BrainStation, people can connect to an all encompassing cyber world. This virtual world is constructed like a neural network and the entire system is controlled and dispatched by the master brain Watson. However, over time issues are starting to surface: many people can't distinguish between virtual and reality, leading to psychosis and long-term addiction to the virtual world.—MyAnimeList

In 2075, the Earth's resources are being depleted and a highly technological and competitive society is pushing the human mind to the brink of collapse. The young people of the 20th century have been dubbed the "ruined generation" and are indulging in virtual reality games on a massive scale. In order to rescue the increasingly disillusioned human race, the Phantom Hunters were created.—AniDB