In the middle of the XXI century, human race faces a test: genetic engineering has changed the world, and with huge advantages of the study accelerated accordingly. The "immortality" gene no longer seemed simple sleep. However, the laboratory sample containing this gene escaped by creating a new form of life, which took the genetic material from the natural world, turning into the enemy, which began to invade the human world. "Shahors" now-force capable of defeating people. Military forces, as well as the continents of North and South America, fell under their control. In Japan, the government has created a division of "Samurai" to confront Shahers, using soldiers improved by Nano-machines for connecting to an armored exoskeleton. It was at that moment that Tsukhara Tremeteryici is appointed to the first platoon of "samurai power". ""