The story takes place at the end of the "Xuanshu Period" when the ancient times collapsed and all kingdoms stood side by side - a world of immortals where spiritual energy has declined but the machine skills still have embers. The young craftsman Mo Heng (pseudonym Lu Ban) came from a humble background and was an apprentice at a carpenter's shop in Qingya City. His fingers were naturally green and warm to the touch of wood, but he was denounced by his clan elders as an 'ominous body'. When he was dismantling a piece of rotten wood with a thousand years of agarwood, he accidentally triggered the embedded secret scroll of "Nine Chapters of Heaven's Secret Map" and awakened the ability of "Heart Center Resonance": using blood as a guide and thoughts as an axis, he can analyze, reproduce and even reconstruct the structure of all organs beyond limits. As he built the 'Thunder Wooden Kite' that drove away the bandits, and the 'Qianjun Wheel Cannon' that improved the Ordnance Department's abolition case, he became famous, but also attracted the covetous attention of the court and the hidden "Yan Shizong". The main plot revolves around the 'Ten Fingers Connected to the Heart', which is actually the seal of the ancient 'Tiangong Bloodline', and the fingertips contain the lost power of the 'Border-Breaking Mortise and Tenon' - which can dismantle the 'structure' of the laws of heaven and earth; and the mastermind behind the scenes is secretly casting the 'Spirit Locking Stake' that suppresses the dragon veins of Kyushu in the name of mass production of siege equipment. Mo Heng must use the mechanism to prove the truth and rebuild the Tiangong orthodoxy before the dragon veins are completely exhausted.
