The Bai family's robe shop, run by Lu Xuanheng, faces a supply cutoff and rent demands from the Treasure Pavilion, pushing the business to the brink of collapse. Rather than surrender, he uses the Void Weaving Technique left behind by his master to extract spiritual threads from abandoned mines and weave robes that offer high defense at low cost. After entering the Misty Forest, he meets Ye Shuang, a sword cultivator, and joins forces with Shopkeeper Ge of the Hundred Treasures Hall. At an appraisal convention, he publicly reveals the basic weaving technique, breaking the Treasure Pavilion's monopoly over materials and prices. Three months later, more and more small merchants join the Free Weaving Alliance. Lu Xuanheng grows from a struggling weaver into its leader and continues exploring thunder-and-fire spiritual threads, determined to make his craft serve more ordinary cultivators.