In the imperial heart of the Tang dynasty, a pursuit for immortality goes dreadfully awry. Daoist alchemists, favoring the emperor with promises of eternal life, concoct a potion that births an unimaginable horror. The emperor, once a beacon of divine authority, is transformed into a monstrous entity craving flesh. The sprawling Emperor's Palace, a bastion of celestial order, becomes a mausoleum of the undead.

As a survivor trapped within the palace walls, you witness the relentless spread of the pandemic. The once-hallowed halls echo with the groans of the zombified court, as terracotta warriors stand silent guard over a court that has descended into chaos. The Daoists split into two factions: the Ascendants, who worship the zombies as a new zenith of existence, and the Guardians, who are resolved to contain this curse before it breaches the palace's mighty walls.

In a world where the search for life begets death, the palace is a paradoxical prison of opulence and decay. Survival is a fleeting hope with dwindling supplies and the ever-present threat of being turned into one of the undead. The overarching goal is clear – survive the growing pandemic and escape the palace's confines before it becomes your tomb.