Ratsasan is a pitch perfect crime thriller. It haunts you with the very first scene and continues to do so with its tight screenplay and heard before story of psycho killer. Movie's plot delivers more than expected and surprises you with each scene unfolding a new mystery before you.

Arun played by Vishnu Vishal is an aspiring writer-director who seeks different producers to produce his feature film he has written after years of research on psycho-killers worldwide. Arun fails to get any producer to back his film. Unemployment kicks in and Arun give up the dream of being the filmmaker and takes up the job of a police officer with the help of his Brother-in-law played by Munishkanth. He moves and stay with his sister Kokila played by Vinodhini Vaidyanathan, Doss and their daughter Ammu played by Abhirami, also the niece of Arun

Arun finds it difficult to be a police officer due the never ending chores of his senior officers which were forced on him to make him feel no important at all. One day a simple case of disappearance of a school girl named Amuda grabs his attention. The gift box containing mutilated doll found after her disappearance make him conclude that it is not just kidnapping for ransom but a brutal work of psychopath murderer. He finds the pattern in disappearance and concludes to find Amuda dead as it was two days already past her disappearance. Arun takes up the case to track down the psycho killer but eventually fails each time. Another school girl named Meera is abducted and her teacher Viji played by Amala Paul helps Arun to track down the suspect involved in abduction. It was late though as Meera's dead body was found dumped in municipality bin. Finally Arun catches the suspect, a school teacher of Ammu's school, Inbaraj with gift box containing mutilated doll and Meera's school bag at his place. Inbaraj in order to escape hold Venkat played by Kaali Venkat at gunpoint and at the same time Ammu is abducted too and Arun finds the same gift box with mutilated doll head.

What I can say after watching Ratsasan is just one word 'awesome'. It is like some serious mind blowing Hollywood flix that got you by your throat and freeze you with the fear of losing out if you even blinked. I have to say that it is not permissible during the movie like that even to go pee or see anything other than screen. The only thought that clouded my mind was, 'catch him Arun, and catch him fast before he abducts another one and another one and another one'.

There are few scenes that can jolt you from head to toe and one such scene is when he recovers a body from his own car. It really was heart wrenching. The sole purpose of this movie I can guess is to make you aware of the psychopaths out there in the real world lurching in shadows and waiting for their turn to attack. May this movie be a fiction but is inspired of psycho killer out there who exists for real.

Movie rhythm is dynamic. It is fast paced to compliment the situation and need of the well written story. Movie score by Ghibran is top-notch as it instills fear in your skin and so is editing by San lokesh. Movie is mostly shot in low key lighting to show the vulnerability of Arun and it fits perfectly with great direction of Ram Kumar. However, it could have been better, the cinematography I think.

Vishnu who plays Arun does some serious acting there and I applaud him for all his effort but who really makes the mark on my mind is the psycho killer who was barely there on the screen and still haunted me. The villain of the movie played by Saravanan did his job really well giving the story it's much deserving villain it needed.

This movie has UA certification that means parental guidance is required for viewer under the age 12. However, I don't want anyone below 12 to watch it. Even if you got some faint-heart and no interest in stuff that kills your heart beat please watch something that don't. If you are aged above 12 with heart for adrenaline please stick your ass down on anything and start watching one of the greatest flix you haven't seen yet. I promise you will not regret it, instead you will urge other to watch it as well