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.

The movie is awesome and keeps you engaging until the final climax where suddenly characters started making sillying mistakes and allowing the killer to slip from their hands. Which really was frustrating.

Given that the actor asking in few scenes before to another police officer to shoot at killer without thinking but when himself presented the same opportunity doesn't do so. He has a clear shot ahead while the killer is just paused prior hammering the kid. Actor could have simply shot at killer's hammer holding hand but instead he simply moves near and allowing the killer to slip again.

In several instances I found it dumb for police officers to gave up their vehicles and chase killer on foot when apparantly the killer is in vehicle.

The entire buildup and suspense was truly engaging and the story went quite good untill it reached its climax and closure sequence. Unnecessary past reference that too out of context which lead to illogical conclusion of teasing the killer just to distract didn't made sense. And killer in-spite being diagnosed with hormone disorder disease had surprisingly super natural stamina to keep attempting to arise after every blow. Actor was literally giving the killer third degree kind of beating still killer was amazingly agile and quick on feets.

To sum up the frustrating mistakes were: 1. Police officer not shooting (at least on legs) even when Hero is explicitly repeating to do so on phone.(Atleast he fires at tire. Bless him for that); Plus why he allows the killer to play with cards?

2. Hero not shooting killer (hypocrite) when had clear chance. Was he afraid that killer's speed of swinging hammer being faster than bullet?

3. The actress while running upstairs away from killer is clearly trying to save the kid but surprisingly she somehow manages to forget the kid in very next scene. Lol. Killler was too scary for her consciousness maybe

4. The doctor driving the car when found the kid ahead and after having a glimpse of killer surprisingly turns to feet instead of car to run away. How smart!

5. In a chase scene where the actor is chasing on feet and other officer on bike, the killer gets rid of them easily by applying the brakes and making bike officer to bump on the Van. And amazingly the unhurt actor prioritise to console bike officer instead of continuing chase by bike or foot. Bike officer wasn't really fatally injured!

The movie is quite gripping and has good thrilling sequences. The acting of lead actors is quiet good. The story has few unexpected twists. They have avoided unnecessary violene or display of gore for such type of movies.

However, It could have been made better. The pace bit slow and sequences look repetative. Which can happen when you take a 1.5 hr holllywood movie and make it into a 2.5hr movie. The movie seems to be reaching a climax in middle of the show time and then again starts streching.