Shen Qingci, a female detective in the Republic of China, accidentally obtained a "retrospective jewelry box" that could predict future murders. The items in the box would be updated with the progress of her investigation. But she discovered that the murderer predicted in each box was the person closest to her. While protecting the people around her, she must find the man behind the scenes who can "control the time loop", only to find that the other person is the real culprit who killed her father six times, and the seventh cycle is about to take place with her as the protagonist.
