Set in an unknown future where most of the planet has become inhabitable for humans who are now forced to live in domed cities called the Domepolis while the planet recovers itself. Gainer Sanga is a whiz kid gamer who lives in one such city. Gain Bijou helps those who want to escape from the Domepolis. Moved by Gain's unflinching desire to escape, Gainer decides to join him in his daring escape, but in order to achieve their goal, they have stolen the "Overman" from the mansion of Count Medalle.
Their adventure has just begun....