Antique shop owner Zhang Yu never thought that the yak bone flute left by his grandfather would involve him in a century-old secret. The bone flute was stolen late at night, and the eagle emblem token left at the scene pointed to the foreign organization "Holy Bone Society" - a mysterious group obsessed with plundering the secret treasures of Eastern ancient tombs.
Opening the dusty diary of my grandfather, on the yellowed pages, the handwriting from 1950 recorded the thrilling past: the cooperation with the Holy Bone Society, the rebellion in the tomb of King Yinshan, the disappearance of his companions, the thrilling escape using the bone flute... It turns out that grandpa is not an ordinary "walking immortal", but a "tombkeeper" guarding the ancient tomb.
In order to regain the bone flute and find out the grievances between his grandfather and his companions, Zhang Yu teamed up with Lao Zhou (the son of his missing companion), veteran Ouyang Jie, and equipment master Moazi. They followed the incomplete map in the diary and entered the strange maze of the Yinshan King's Tomb. The illusion of the Nine-Bend Soul Array, the fierce grievances of their children and mother, and the pressing steps of the Holy Bone Society allowed them to glimpse the truth on the edge of life and death: the so-called "Secret Treasure of Immortality" was actually an evil object refined from the grievances of living people.
When half a tortoise shell with "Kunlun" engraved on it appears, clues point to the more distant nine-story demon tower. Hidden there is the true goal of the Holy Bone Society - the Kunlun Sacred Tree that can suppress evil spirits in the world. From Yinshan Mountain to Kunlun, from tomb chambers to snowy illusions, Zhang Yu gradually understood the profound meaning of "thieves do not do it for wealth, but to protect the world" in his grandfather's diary.
The protection of two generations, the confrontation between Chinese and foreign forces, the secrets and curses in the ancient tomb, all slowly unfolded in the sound of this bone flute. When the Greed of the Holy Bones meets the Obsession of the Tomb Keeper
