A good thriller is possibly the best thing one should be dying for. But among millions of its genre, not too many movies make it a count. Some are great, some fall flat from the beginning, some make disappointed at the climax. Now only the viewers have to decide Ratsasan(translates Demon) will fall in which category. Vishnu Vishal performs as Arun, a wanna-be serial killer movie director turned police officer. He witnesses teenager schoolgirls in his city being kidnapped and brutally killed one after one, by a mysterious serial killer. He gets some hints; but always getting discouraged by his senior officers. Arun then single handedly investigates the matter and faces it's shocking consequences. Ratsasan, despite a tad long of 2 hours and 32 minutes,will make the viewers' eyes glued with the screen all the time thanks to its gripping events and twists. But somehow, viewers may have a little but disappointed at the last. The music and bgm is top notch. May be the best of its release year. The plot should have been more sharp and precise. Acting is satisfactory. Overall, Ratsasan is a positive welcome to the triller genre .