Lin Gang, a retired warrior, by chance acquired the "Hunyuan Immortal Body", which can withstand flying swords with his physical body. In an accident, he became Gu Xingzhou's personal bodyguard, but he didn't know that his employer was actually an important reincarnated figure in the world of cultivation. Su Li, the jade spirit sleeping in the jade pendant, wakes up and can see the murderous intention, and fights side by side with Lin Gang against the demon killer Mo Han.
With the assassinations and counter-kills one after another, the chess game of cultivation behind the city gradually emerges - sect disputes, secret ruins, and past grudges are all closely linked to Gu Xingzhou's fate. Under the guidance of Su Li, Lin Gang broke through the realm, stepped into the world of cultivation, and was involved in a battle to protect the three realms of humans, immortals, and demons.
When the truth is revealed, Mo Han's purpose, Su Li's life experience, and Gu Xingzhou's fate all point to the same shocking conspiracy. Lin Gang must choose between emotion and mission, and use his immortal body to guard the right path until the heaven and earth return to silence.