Lin Chenzhi, a folklorist who suffers from sudden pain in the veins on his left arm, follows a half-yellowing diary into the Corpse Hunting Ridge in western Hunan in order to find his missing grandfather and solve a family curse; retired special forces soldier Bikui, who witnessed his father being killed by a "puppet" in his childhood, is determined to track down the supernatural truth behind it; Aji, a descendant of Bimo from the Yi ethnic group, tracks down the mysterious organization "Lomb Shou Hui" with a soul-channeling copper bell in order to find his abducted mother. The three accidentally formed a team due to an underground palace crisis and were involved in a thousand-year-old battle to protect civilization.
From the corpse Gu underground palace in the Corpse Ridge in western Hunan, to the wooden armor workshop in the Hanging Coffin Gorge in Bashu, from the Mother and Child Gu Formation in the Gu King Valley in the south of Lingnan, to the golden armored puppets in Heichengzi in the northwest, to the puzzle of the sharks in Guixu Island in the South China Sea and the memory illusion in the Ailao Mountain in western Yunnan, they followed the clues of the nine "Jiuli Secret Keys" and traveled through eight dangerous secret places. Each secret key hides fragments of the ancient Jiuli civilization - the past split between the Wu Zhu sect and the Soul Eater sect, the true meaning of the secret technique of "symbiosis of all things", and the conspiracy of "Ghost Face", the leader of the mausoleum guarding society, to resurrect Chi You's remnant soul.
When the secret keys were combined to form the "Chi You Star Map", the blood jade coffin in the Guixu Underground Palace was shaking. The truth about the grandfather's disappearance, the mother's hidden position, and the true identity of the ghost face were revealed one by one. This adventure that began with personal obsession eventually became the redemption of civilization spanning two generations: they used the power of the earth's veins to lure the remaining souls back to their places, used Bimo's secret technique to awaken their sanity, and relied on the wisdom of the organization to defeat the puppet army. In the end, they protected Jiuli's original intention of "secret techniques to serve the common people" and let the light of symbiosis of a thousand-year civilization shine into the haze of the modern world.
