Yun Heng, the messenger of evil in the immortal world, walks alone with cold eyes, and is good at judging cause and effect in other worlds. He has never cultivated love, nor does he believe in destiny. He only judges the world's illusions with sharp blades. Cracks suddenly appear in the mortal world, the floating world and the fairy world intersect, and all living beings want to seize eternal life through chaos. Yun Heng was ordered to descend to the lower world, but found that his past was inextricably entangled with his fate in the mortal world, and his past choices were like sharp undercurrents tearing apart his faith. Walking on the edge of two worlds, he is both the judge and the judged. Every time you take action, you are betting on the ownership of your soul. He does not want to save the world, but only wants to expose the truth about the immortal world and find the meaning of his own existence. In the cold wind and rain, Yunheng fought against countless desires and lies with his own strength. The blade pointed at the fate of the people and his own salvation.