During a mission to apprehend drug traffickers along the Yunnan frontier, a special operations unit unintentionally ventured into the age‑old Shu caverns and disrupted sacred rites. The team was nearly wiped out. Only Shen Shuang and narcotics officer Sun Desheng survived, thanks to a mysterious white‑haired savior named Wu Hao. Following that ordeal, the two men stumbled into the Civil Affairs Investigation and Research Bureau, where they became embroiled in further supernatural incidents that unveiled a hidden realm in the depths of the ancient hidden world.
