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In order to compete for dominance, the two major forces, the shogunate and the Emperor's family, started fighting openly and secretly in the huge city of Tianfu, and the emergence of clever technology made the battle between the two parties even more intense. Shinai Tasaka, a secret agent of the shogunate, was ordered to investigate Kuzo Kugimiya, a machine-master who lived in seclusion in the outskirts of Tenfu. He discovered that Jiuzang was closely related to an incident that brought down the curtain thirty years ago, and that the girl "Ibu" who lived with Jiuzang was actually a machine-made doll that was no different from a real person. The art of ingenuity can create exquisite machines and birds and beasts that look like living creatures. However, no one knows how the ingenuity dolls that are supposed to have no soul can think and act like humans, and have joy, anger, sorrow, and joy like humans. After many inquiries, Jinai realized that all the clues pointed to the "Artifact of the Age of Gods" that had been passed down secretly from generation to generation in the Emperor's family. Jinai went to the capital to investigate, trying to uncover this long-standing secret. At the same time, the Emperor's family, which had been dormant for a long time, also started taking action...