Underneath the seemingly peaceful modern city lies a dark world intertwined with Taoist forces, thousand-year-old secrets and supernatural events. Xiao Tianji, an orphan with the "Nine Yin Fate", was haunted by hundreds of ghosts when he was born, and his family was wiped out. After experiencing life and death, he was rescued by Lin Jiuyuan, the master of Lushan, who taught him the "Yin Fu Jing" and the Five Thunder Methods. When he became an adult, he joined the "Nine Yin Secret Bureau", a national secret agency, specializing in handling supernatural cases.
