In a Japan where myths and legends come true; the threat of yôkai & Kaijû push the kingdom's limits in terms of defense century by century. The walls are higher and the weapons bigger. The “Kinzoku”, a civilization with surprising tattoos is experiencing a startling technological evolution. These improvements allow their minds to become one with the inanimate. The industry is being boosted by new inventions, such as the connection between Human / Machine, which is done through ritual tattooing.

Coupled with the appearance of a new black powder from the west, this civilization has developed an incredible weaponry that few can compete. Thanks to this and their great skills in working metal, they were able to inherit an insane bastion.

The threat from under the mist grows. The populations are at risk by taking the dangerous "Iron Road". This road is shaken by the deployment of the “Hands of God”, the powerful giant armor with a divine firepower, made to reconquer the lands below.