Zhou Yansheng, the only son of the Zhou family and a genius academic master, dropped out of school and returned home to take over a century-old house. There are undercurrents surging in Yuncheng in the south of the Yangtze River, corpses are floating in ancient wells, bell towers are closed, and many strange cases are all related to astrology maps. He looked at the world with a cold eye, but found that his stepmother Murong Wan was looking up to the stars late at night and behaving in an evil and crazy manner. They look gentle on the outside, but they hide secrets; they look like family members, but they also look like rivals. He used physical deduction to solve the problem, dug into old family cases step by step, and monitored his stepmother's whereabouts, only to see her meeting mysterious people at night and telling the truth while she was ill. The truth is intertwined with madness, and reason faces confusion. He decided to uncover the answer to the mystery - but when the fragmentary pictures were put together and the stars were restarted, he realized: she was not an intruder, but a returner.