Baiyun Palace was destroyed overnight, mysterious forces in the martial arts were surging, the power struggle within the Nangong family was secretly taking place, and the revenge of the Situ family came quietly... The truth of forty-nine years ago came to light, Nangong Zhentian's power fell, and the Holy Sword City was perilous. See how Nangong Mu turned the tide and restored the building before it collapsed... Why did the four major families have a century-old connection? What secrets are hidden in the four magic weapons? Who will get the final treasure and become invincible? Between the light of the sword and the shadow of the sword, nothing can be hidden!