Lu Chen, the "Shadow" undercover agent of the Fuyun Division, was cursed by black fire for destroying the demon sect's divine spell, which completely ruined his cultivation. After ten years of exile and seclusion, Master Tian Lan reappeared and assigned Lu Chen the mission to infiltrate the Kunlun Sect to locate the hidden demon sect operatives. To repair the damaged Five Elements God Disk, Lu Chen was ordered to join the Kunlun Sect as one of its hundred handyman disciples, living in a thatched cottage. While carrying out this mission, he befriended many people and fell in love with Yi Xin, gradually feeling the warmth of the world. Meanwhile, through various clues, he uncovered secrets behind the Kunlun Sect, discovering that the black dragon sealed in the Kunlun Forbidden Land was not an evil monster, but that the righteous Tian Lan actually harbored ulterior motives. Upon realizing the truth, Lu Chen was momentarily confused. Encouraged by Yi Xin, he decided to face his past, abandoning the rigid distinction between good and evil to follow his heart and do what is right.