This is an era in which "man-machine coexistence" has become the norm. Legend has it that the "jishu" left by the ancient gods - a red thread that can give machines life - is scattered across Kyushu. Whoever can collect the nine red threads can restart the "Mountain and Sea Realm" and gain the power to rewrite the rules of the world.
Gong Yeyao is a craftsman who makes a living by repairing old machinery and is gifted with the ability to "talk" to machinery. One night, the mysterious woman Lu Yun broke into his workshop with an ancient gear glowing red, leading to his door a pursuit that swept through the entire Dongwu City. In order to solve the mystery of his life experience, and to prevent careerists from restarting the world of mountains and seas to enslave all sentient beings, Gong Yeyao was forced to take Lu Yun on the road of escape and search.
Behind them is the secret sect "Ji Tian Dao" who believes in "mechanical ascension"; in front of them are the "Red Line Hosts" scattered across Kyushu, each with their own treacherous destinies. And when the nine red threads finally gathered together, Gongye Yao discovered that he was the most critical "pivot" - he was not the controller, but the designed sacrifice.
