In the year 2132, robot fighting machines called a "terra gears" are developed, and used in fighting tornements.
Five years later, man found out how to download human souls into terra gears (these were dubbed "soul gears"),
 just aswell, a month later the terra gears destroyed all biological humans, leaving only the soul gears....

Now, a hundred years later, the soul gears have finaly awoken from kryostasis, with only two goals in mind-
To find a way to retrive the human race, and to destroy the terra gears.........