When Lin Yan, a young man, was collecting herbs in the Qingming Mountains, he accidentally obtained a broken sword engraved with cloud patterns, and awakened the long-lost "Yuehen Sword Art". Since then, he has been involved in the undercurrent of the world of cultivation. He discovered that the broken sword in his hand was closely related to the Yunyuan Sword Sect that collapsed twenty years ago, and that he was actually an orphan of the sect. With the obsession to avenge his father and find out the truth, Lin Yan embarked on the path of spiritual practice.
On the way to find the key to the Yue Hen Secret Realm guarded by Yunyuan Sword Sect, he met Qingluan Sect monks Xiao Wenxue and Su Yao, and fought side by side with Ice Soul Peak Master Shen Ruoli. Faced with the pursuit and interception of Xuantian Sect colluding with the devil, everyone broke through the Jiuxiao Yunyuan Formation in the Hidden Sword Pavilion, fought against the turbulence of time and space on the top of Qingming Mountain, and broke the illusion of inner demons in Jingyuan Lake. As the three keys to the secret realm are gradually gathered, a shocking conspiracy emerges - the ancient demon king's seal is loosened, and the man behind the scenes is trying to use the power of the secret realm to subvert the world of cultivation.
Using the broken sword as a guide, Lin Yan merged Yunyuan's sword intention and the power of his companions to start a life-or-death contest with evil forces in the folds of time and space. When the truth behind the bronze mask is revealed, can he cut off the shackles of fate, let the Yuehen sword shine again in the world of cultivation, and protect the balance of the long river of time?
