Lu Chen serves the Fuyun Division as Shadow, an undercover agent, until he destroys a divine spell of the demon sect. As a result he is cursed with black fire and his cultivation is completely wiped out. After Lu Chen spends ten years in exile and seclusion, Master Tian Lan reappears and gives him a new task: go to the Kunlun Sect and find the demon sect's hidden spy. To help repair the damaged Five Elements God Disk, Lu Chen is ordered to join Kunlun as a handyman disciple working in the thatched cottage. While carrying out the mission, he makes many friends, meets Yi Xin, the love of his life, and gradually comes to feel the warmth of the world. Clue by clue, he also begins to uncover the secrets behind Kunlun, including a black dragon sealed in the Kunlun Forbidden Land.