Four centuries of separation turned Earth and its colonists into different species wearing the same name. When the spacers come home, they're not reclaiming anything, they're invading a world that evolved without them and doesn't want them back. The real war isn't against the planet or the people left behind; it's the slow, brutal realization that "home" stopped existing the moment the ships left.

Centuries after a radioactive asteroid nearly wiped out humanity, the descendants of its survivors return to reclaim the surface of Earth. One faction, the aristocratic Dobias, had fled into space colonies, while the Shioru, a people of farmers and nomads, had sheltered underground. The world they come back to is ruled by predatory Creatures called Siliconians, and the two groups are locked in a cold war over scarce resources that could erupt into open fighting. Standing against the Creatures is the Geisters, an elite five-member Dobias squad whose powers go far past those of ordinary people: Dean Henos, Alcion Fama, Cris Vesta, Victor Deicius and Shai Tanna. The team has just accepted a soldier of Shioru heritage, and her assertive manner leaves the others doubting her loyalty and her value to the group. With political strain rising and a hazardous weapon quietly in development, the Geisters must keep the peace within their own ranks and across society in this 26-episode action and science fiction TV series.