In the year 2024 a supernova occured and wiped out almost the entire planet. The planet managed to survive... barely. It was a desolate wasteland. At the time we thought that it was over. We were wrong. From the ashes of this explosion mechanical beings called NOVAS appeared. They caused havoc on earth slaughtering everyone. The only form of survival we had was to build settlements behind powerful walls and pray. Ten years later we found a technology that can be used to kill Novas. It was called the EMA gears.