During the Yonghui period of the Tang Dynasty, the celestial phenomena were chaotic and the people were struggling to make a living. The Heavenly Supervisor was ordered to pray for rain, but unexpectedly, chaos and chaos arose. His actions attracted a thousand demons to descend into the world, and in an instant, the sea of blood flowed across the Dao Tai. Under the heavy pressure of the imperial court, the Chief Supervisor of the Imperial Academy, Gao ShengyaoForced to use the mysterious death row inmate Dugu (played by Ren Dahua) to investigate the case, rumors of Chang'an demons and demons abound. The underground ghost night market emerges, and the long hidden demons and water ghosts reappear and cause chaosThe demons and monsters in the shadows are stirring up, making the case even more mysterious. Among them, the snake and scorpion beauties who seemed to know everything became Dugu's target. However, Dugu, who appeared to shoulder justice on the surface, seemed to have some shortcomingsThe well-known dark past