The story takes place in the "Era of Spiritual Rust" - the end of the Dharma era when spiritual energy is exhausted, ancient methods are incomplete, and martial arts are declining but traces of ancient times are hidden. The protagonist Men Wuxie, the caretaker of the ancestral home, is poor, lonely, and has no blood. He woke up with blood dripping from the bronze door knocker of his ancestral home. The door knocker was melted into twin round blades 'Cl' and 'Pu', which can cut off cause and effect, break spiritual veins, and hold down the door. The "Zhenyue Sect" of the martial arts family follows the traces and reveals the truth about its "gatekeeper" bloodline: its ancestors once used their bodies as keys to seal the nine taboo doors. Now the first seal has loosened, and the alien breath has quietly seeped into the human world. Men Wuxie was forced to embark on the road of recasting the seal, but discovered during his practice that the so-called 'forbidden door' was actually set up by ancient monks to imprison the 'original gatekeeper'; and he himself was the original reincarnation of the original gatekeeper who had his memory stripped away and dispersed into the mortal world. The main line runs through bloodline awakening, seal repair, life experience deconstruction and final decision.
