Fighting against the Yin and Yang House

During the Republic of China, it was widely spread that burials in the Yin house were feng shui. The so-called "wealth depends on the Yin house, and promotion depends on the Yin house" was very popular. The position of Mr. Yin-Yang is even more popular because he has the ability to penetrate the dragon's lair and break up the Yin-Yang house. Guo Yinyang (played by Kaohsiung), known as the "Earth Fairy", came to Lingshan Town to look for his benefactor Zheng Weng (played by Hou Tongjiang), and discovered the mysterious rat marriage hidden deep in Lingshan Town and the story of death in a land with extremely feng shui. Yang people live in the Yin house, and the day they return home will cause evil spirits for the first seven nights. Two brothers who made a fortune by stealing Feng Shui have observed filial piety for three years. Behind their true and false filial piety are hidden taboo stories about carp caves. The Yin man returns to the Yang house and looks for the long-haired woman in red every night. All the clues involve the three stories. The cause and effect are not empty and the cycle continues. What is the answer behind it?