Mysterious commission: Private detective Lin Mo received a commission from the mysterious woman Zhou Yuqing to investigate her missing sister Zhou Xueqing. However, the photos provided by the client showed that the two sisters looked exactly the same, which aroused Lin Mo's suspicion.
Weird investigation: Lin Mo went to the old suburban house where Zhou Xueqing was last seen to investigate, and found that the house was covered with dust but there was a cup of fresh coffee, and childhood photos of twin sisters hanging on the wall, but Zhou Yuqing insisted that she was an only child.
Horrifying discovery: In the basement of the old house, Lin Mo found a hidden room filled with surveillance equipment and a locked safe. The walls were covered with photos of Zhou Yuqing's daily life, but the date showed that they were taken after he "disappeared".
Identity mystery: Lin Mo suddenly realized that he might have fallen into a well-designed trap, and the true identity and motives of the client Zhou Yuqing became confusing.
The ultimate twist: When Lin Mo found a death certificate of Zhou Xueqing in the basement, he realized that the "Zhou Yuqing" in front of him might be the missing Zhou Xueqing himself, and the entire commission might be the beginning of a revenge plan.
Philosophy: The process of Lin Mo accepting the commission and starting the investigation, and the series of strange clues he found in the old house, which gradually revealed the suspicious nature of the client's identity