Criminal investigation expert Lin Mo is hunting down a "ghost", a serial killer with superb skills who seems to have insight into the police. As the investigation deepens, he is horrified to find that all the clues point to him - those memory gaps stemming from PTSD in solving the case, the rare loss of control due to drug dependence, and the unique mental imprints left at the scene. In the end, he must face the horrific truth: the murderer is the "other self" twisted out of his own trauma, committing crimes with twisted "justice." Lin Mo, who collapsed, chose to reveal everything, accept legal trial, and atone for the "sins of yesterday" that were out of control.
