Lu Chen, the "shadow" undercover of the Fuyun Division, was cursed by black fire for destroying the magic cult's spell of descending gods, and his cultivation was destroyed. After ten years of exile and seclusion, Master Tianlan reappeared and gave Lu Chen the task of going to Kunlun Sect to find the undercover of the magic cult. In order to repair the damaged Five Elements Divine Disk, Lu Chen was ordered to become a handyman disciple of Kunlun Sect's Baicaotang. In the process of carrying out the mission, he met many friends and his lifelong love Yi Xin, and gradually felt the warmth of the world. At the same time, he touched the secrets behind Kunlun from various clues, and found that the black dragon sealed in the Kunlun forbidden land was not an evil monster, and Tianlan, who had always claimed to be for justice, had other intentions. Lu Chen, who recognized the facts, was confused for a while. With the encouragement of Yi Xin, he decided to face the past, no longer stick to the so-called distinction between good and evil, but to follow his heart and do the right thing.