On a cold-food night in the third year of Tianbao, an ice corpse in Chang'an's ghost market dies mysteriously, and a Netherworld mandrake blooms from it. The disgraced minister's son wields a set of celestial divining rods, while a Maoshan Taoist priestess consecrates the Azure Heaven Sword. Together, they uncover the century-old blood sacrifice of the Wei clan. The dragon-locking chains snap, ghost soldiers appear in the mortal realm, and the Noble Consort's rainbow robes sweep open the Gates of Hell. In this contest between humans, demons, and ghosts, the fortunes of the Great Tang are the wager.