Zhang Yu, the owner of an antiques shop, never imagined that the yak-bone flute his grandfather left behind would drag him into a century-spanning secret. The flute is stolen in the dead of night, and the eagle-emblem token left behind points to an organization overseas called the “Sacred Bone Society,” a mysterious group obsessed with plundering the treasures of Eastern tombs.
When he opens his grandfather’s long-sealed diary, the faded pages reveal a harrowing past in entries dated 1950: cooperation with the Sacred Bone Society, a falling-out inside the Tomb of the Yinshan King, a companion’s disappearance, and a desperate escape using the bone flute to break through an array... It turns out his grandfather was no ordinary “wandering immortal,” but a “tomb guardian” who protected ancient graves.
To recover the flute and settle the score between his grandfather and his companion, Zhang Yu teams up with Old Zhou, the missing companion’s son; Ouyang Jie, a former soldier; and Haozi, an expert in equipment. Following a fragmentary map in the diary, they enter the treacherous maze of the Tomb of the Yinshan King. Illusions from the Nine-Bend Soul-Snaring Formation, the resentment of a mother-and-child evil spirit, and the Sacred Bone Society closing in at every turn bring them face-to-face with the truth on the brink of death: the so-called “secret treasure of immortality” is an evil object forged from the resentment of the living.
When half a tortoiseshell inscribed with “Kunlun” appears, the clues point toward the distant Nine-Story Demon Tower. There lies the Sacred Bone Society’s true target: the Kunlun Divine Tree, which can suppress evil spirits throughout the world. From Yinshan to Kunlun, from tomb mechanisms to snowy wilderness illusions, Zhang Yu gradually understands the deeper meaning behind his grandfather’s diary entry: “A tomb raider steals not for wealth, but to protect the world.”
The guardianship of two generations, the clash between forces from China and abroad, and the secrets and curses hidden in ancient tombs all slowly unfold to the sound of the bone flute. As the Sacred Bone Society’s greed collides with the tomb guardians’ resolve
