Mild spoilers: Film follows a whodunit style narrative and the lead cop is trying to catch the serial killer that's what forms the crux of the story. Typical concept that we usually see in investigative thriller however what makes it cut above rest is its screenplay and spine chilling bgm. Film has its flaws and often tries to deceive audience by throwing usual bait to confuse and later lead to another perpetrator, to me which was quite obvious. Make up department could have done a better job. On the acting front lead actors were convincing and has done good job. Positives: background score, Screenplay, Actors, cinematography. Negative side: film was quite lengthy, killer's killing motives lack finesse. Film definitely deserves your time and money because after completing watching movie it will definitely haunt you for some time for its eerie vibe and bgm that has to offer you.