In the near-future Kyoto where technology and kendo blend, Aoi Kanbara was accidentally eroded by mysterious black corrosion marks in the quantum data battlefield of Kyoto Tower. This seemingly cursed pattern is actually the key key buried by Musashi and Kojiro when they sealed the power of nothingness three hundred years ago. When the ancient kendo inheritance encounters the crazy tampering of quantum technology, every time Aoi swings her sword, she rewrites the rules of kendo.
Fighting side by side with Hayato Kazama, the hacker genius, and Yukino Sasaki, the heir to the kendo family, Aoi shuttles between the torrent of data and the real world. From the sleeping bronze mask at the bottom of the mirror pool to the rampant quantum pendulum at the core of the clock tower, they time and again cracked the deadly traps built by the enemy using kendo data. In the life-and-death confrontation, Aoi awakened the ability "The World" to suspend time, and under the guidance of the golden etching marks, she understood the ultimate secret of Musashi Kendo.
However, every victory is accompanied by a deeper conspiracy. Disappeared enemies are reborn in the data stream, and mechanical legions sweep across the city with the threat of autonomous evolution. Even the missing genius researcher of the Sasaki family has transformed into a terrifying semi-mechanical existence. When the purple thunderclouds above Kyoto gather into an ominous swallow shape, Aoi must understand the shocking truth behind the seal three hundred years ago before the power of the erosion completely goes out of control - the future of kendo and the destiny of mankind will eventually usher in a moment of awakening that overturns everything in the ultimate collision of the torrent of data and pure sword intent.
