Peace has finally come to the ninja world, but with peace many ninja have found that they were no longer needed in this new world and have taken up either a life of crime by becoming professional assassins and/or thieves or merely living a life of peace and prosperity in the peaceful world. However, mysterious murders have suddenly skewered throughout the world as the mark of a red X in the victim's blood was always left upon the wall or ground, marking the recent presence of a Mysterious Organization.
This caused panic in each village to rise, unknown to the people of this world these murders were being done by a large group of Rogue Shinobi. This rogue shinobi wished to rebuild the long dead organization similar to the Akatsuki after finding out that all the Bijuu were sealed away in multiple Shinobi throughout the world.
Upon receiving word of this, all hidden villages around the world began to buff up their defenses to maximum levels, becoming extremely entrusting and starting a conquest of their own areas; and as this occurred, the newly formed Organization looked upon this with humor in hope that the villages would tear each other apart.
The Kages now not only ruled over their village, but an entire country of their own, all hidden villages becoming war-mongering dictatorships, ruled by a single person, who had the power to plunge the entire country into a massive war if he pleased. This greatly increased the power that the Kages held, and thus, Kage summits ceased to exist, for isolation began to take its grip on the all the countries.
The few villages that remained are finding themselves as the last line of defense of the fragile peace and are once again called to defend the lands. However, hostilities began to rise as the strength of a shinobi grew even greater, each country was now in a race to develop the greatest ninja army the world had ever seen. All forms of peace treaties have become non-existent, and the world is on the brink of the sixth great shinobi war! The Battle is now, the war is about to begin, what side will you join?