Metallargans - the supercomputers modeled on the basis of the human brain, which once served the country of Visoria. Now, however, they pose the greatest threat to it. Having lost the battle but not the war, Visoria was forced to retreat to massive underground cities. To reclaim the surface for its inhabitants, Salvo, general of Visoria’s First Division, begins to devise a plan to destroy the Metallargans. A key role in this plan falls to Tessaya - the prototype of the latest generation of “SAAIN” series androids.