In this ancient city, there is a secret that no one knows - every ten years, someone disappears mysteriously, and the only clue they leave behind is a yellowed diary. What was recorded in the diary was an incredible truth: the missing person actually experienced the same crime at different times.
Detective Qin Mo was assigned to investigate this series of incidents. As the clues unfolded, he discovered that there was a deeper mystery behind this serial case. Time, crimes, and memories are intertwined into an unbreakable puzzle, and everyone around him seems to be hiding deep secrets, and even himself is caught in it.
In the gap of time, he must find the traces of crime hidden deep in the years and uncover the truth... But every step closer makes him more and more confused. Is it a prank of fate or someone else's careful planning? When memory and time intertwined, and when the truth gradually emerged, he realized that he was already behind bars.
