Li Yanran, an archive clerk, never imagined that those sealed case files would come to life. When she touches the file on an old case, she and detective Chi Nan are pulled into the time and place where the crime took place. They become “outsiders,” able to see the tragedies about to unfold but unable to intervene directly.
Their only weapon is the brief clue about the outcome recorded in the case file.
From a dismemberment on a rainy night to a string of disappearances, the two transmigrate again and again to the scenes of the crimes, racing the killers to try to change the victims’ fates. At the boundary between reality and illusion, Li Yanran’s calm restraint clashes with Chi Nan’s passionate impulsiveness. They go from strangers to a well-coordinated team, from partners in the field to each other’s deepest bond. But every time they change the past, the case files in the present are distorted as well. They gradually discover that a far larger shadow lurks behind all the cases, and that the files seem to be a “script” prepared just for them.
When kindness becomes a trap and an even greater evil lurks behind the truth, can they still hold on to the convictions they started with?
