Lin Shen, the top master of the Sixth Yao who had washed his hands in the golden basin, was forced to return to the world due to a bizarre "Qiyao Sacrifice Serial Murder Case". The murderer arranged the murder in the order of sun, moon, metal, wood, water, fire, earth and seven ancient hexagrams. No physical evidence was left at the scene, except for an ancient coin engraved with hexagrams in the victim's hand. Although Su Qing, the captain of the criminal police detachment, does not believe in metaphysics, she has to rely on Lin Shen's ability to "tell life and death." The two went from doubting each other to relying on each other for life and death, and raced against death within twelve hours.
However, there is a bigger conspiracy hidden behind the case - Qiyao Pavilion, Guixu Organization, and the Lawful Ones. The three parties have been entangled for thousands of years, just to compete for control of the city's underground dragon veins. Lin Shen's master Yi Wuming was actually one of the masterminds behind the scenes, and his amnesiac lover Liu Xi was the "Saint Container" imprisoned in the Dragon's Lair. When the hexagram technique becomes a "weapon of the law of cause and effect" that can be calculated, deleted, and swallowed, and when the wordless tablet begins to erase all traces of the existence of metaphysics, Lin Shen must make a choice between "calculating all the secrets of heaven" and "guarding the human heart."
From Liuyao Najia to quantum causality, from urban feng shui to dimensional war, this is a suspenseful fable about "memory and forgetting, logic and exceptions, divinity and humanity". When the final thirteenth wordless tablet was engraved with "In the ordinary, the hexagram heart is clear", Lin Shen, who had lost all his hexagram skills, truly understood the first hexagram of the "Book of Changes".
