At 12:07 midnight, the gap between Yin and Yang opens, and the blood moon hangs high.
Forensic doctor Lu Zhao, a young man with a psychic constitution, was involved in a series of bizarre murder cases. In the funeral home, seven corpses had strange "reverse corpse spots" on their left shoulder blades, with different ancient hexagrams appearing in each spot. This is not an ordinary murder case, but an ancient contract signed between the Yang world and the underworld "Yijingsi" thousands of years ago, which is quietly invalidating.
Holding the ancestral "Three Evil Coins", Lu Zhao, with the help of Shen Qingwu, the proprietress of the mysterious antique shop, shuttled between the modern city and the old memories of the Republic of China. The fate of people whose fate has been changed by the "Destiny Master", the 1937 soul-calling video in the bronze mirror, and even the people around them who have died long ago without knowing it...
When the "Questioning Yin Technique" predicts death, and when the secret of his missing father surfaces, can Lu Zhao prevent this catastrophe that subverts the worlds of Yin and Yang, and uncover the ultimate truth of "the seven hexagrams are in harmony, and Yin and Yang are in chaos"?
