Big Tree City

In the year 2045, cybernetic mercenary Motoko Kusanagi returns to Section 9 to face a dangerous new threat: the posthumans.

The story is set in the galaxy located near the center of the universe. There are Planet Aernia (a planet for Heroes) and Planet Orbs (a planet for robots), governed by Orbiton, in this same galaxy. Various countries are present in Planet Aernia; they are, Volculm (volcanic country of fire), Zylan (oceanic country of water), Elvan (green-rich country of forest), and Aleum (celestial country of clouds). Antania, is a nucleus of all the present countries. It has an academy that fosters Heroes. Under the reign of the Governor General, Antania upholds a national policy to train Heroes to prevent Planet Aernia to be infringed by the Dark Desire. Heroes are not only the reliable source of battle who have special abilities to freely use the battle discs, but also a symbol of unfailing justice.

A woman finds herself trapped in a virtual circus where she and five other humans are subject to the whims of a wacky AI ringmaster. In this digital purgatory they must face frightening NPCs and cope with their own personal traumas.