During the Shenlong period of the Tang Dynasty, bizarre murders occurred one after another in Luoyang City. The deceased all held mysterious bronze nine-link rings, and their identities remained a mystery. Di Renjie was ordered to investigate the case, but it involved secrets of the previous dynasty, secret struggles in the court and shocking conspiracies of overseas forces.
The nameless corpse under the Tongque Tower, the ghostly shadow of an abandoned ghost house, the unusual whereabouts of Prime Minister Zhang Jianzhi... Clues are intertwined into a web, and behind the Nine Links, there is actually an ancient tomb mechanism that has been sealed for thousands of years. Di Renjie peels off the cocoon, Li Yuanfang bravely braves the danger, Wu Zetian secretly plots, who is the real murderer?
When the last link is untied, the truth is far more horrifying than imagined...
