Following the Kinki upheaval that divided Japan into east and west, the revival of the powerful artifact IXOLDE in Osaka threatens the fragile peace established after 13 years. President Hidehisa Nakamura of Tokyo leads an invasion of neutral Nagoya to stop the artifact's activation. The mystery behind Osaka's resurrection of this sacred treasure sparks a fresh conflict between the two regions, igniting a new war in the heart of Japan.