Synopsis：During the Republic of China era, folk tales about Feng Shui for burial sites were widespread, with the saying "Wealth depends on Yang houses, promotion depends on Yin houses" gaining popularity. The profession of Yin-Yang Master, who possessed the skills to assess dragon veins and determine the fortunes of Yin and Yang dwellings, was highly sought after. Guo Yinyang (played by Gao Xiong), known as the "Earth Immortal," arrives at Lingshan Town in search of his benefactor Zheng Weng (played by Hou Tongjiang). He discovers that the town harbors mysterious legends of the Rat Marriage and the deadly lore of Feng Shui- doomed lands. The living reside in Yin houses, and on the day of the return visit, they clash with the taboo of the seventh night. Two brothers who built their fortune by stealing Feng Shui observe three years of mourning, but behind their seemingly genuine filial piety lies a forbidden tale about the Carp's Nest. The dead return to Yang houses, searching every night for a long-haired woman in red. All clues weave three stories together—karma never ends, the cycle repeats. What is the ultimate mystery behind it all?