With the events of S.C.U 12 years ago behind them, the Valentine sisters have departed their separate ways to begin their individual lives, but after learning about a dangerous threat facing the world’s two most powerful superpower nations, they must unite with long time faces as well as having the two nations work together in order to stop the Imperial Regiment Group (I.R.G): a Russian Paramilitary Militia from obtaining the Vitanium before it becomes a catastrophic World War III. Will they be able to have them work together and help stop this threat or will it be the end of civilization?