Tamilnadu police is baffled by the murders of prominent personalities by random people. Manoj(Biju Menon), a policeman, is assigned to the case but he disappears without a trace during the flight from Mumbai to Chennai. His distraught sister calls on her older sister's husband Arivarasu(Vijayakanth) to investigate the disappearance of her brother. Arivarasu, who is a criminal psychologist and a teacher at the Police Academy, begins to investigate Manoj's disappearance and soon stumbles upon the real plot that has far-reaching consequences.

The film has a plot that is large in scope but not ridiculously so. It starts off with good suspense as random individuals kill prominent figures and by the time the full picture is revealed at the end, it turns out to be a plot worthy of a good thriller. It has a number of small twists(the biggest twist, occurring before the intermission, turns out to be a disappointing cheat though) and surprising plot points that keep it moving without any slow spots, which is the key ingredient of an action thriller. And the villain's climactic plan is grand enough to cap off the ambitious plot.

The movie doesn't insult our intelligence when it comes to Vijayakanth pursuing the case. Its not just all brawn and the methods he employs, whether to smoke out the villains or get more information about them, are quite clever. His plans are a bit too simplistic to place the movie alongside the likes of serious police procedurals like Vettaiyaadu Vilaiyaadu but he does progress in the case logically without cinematic leaps of intuition and things conveniently falling into his lap. Things he does which seem silly(like releasing the college guy with just a slap on the wrist) almost always have a satisfying explanation subsequently and seemingly random acts(like receiving a phone call about the villain's exact location) are convincingly explained soon after.

But there are the usual suspects that pop up at regular intervals to remind us that we are watching a Vijayakanth movie. So we have cheap graphics(even simple explosions look obviously fake), unnecessary songs introduced under lame excuses - or no excuse at all - and unbelievable stunts(a horizonal leap by Vijayakanth and the villain through the door of a moving train takes the cake). The movie also lacks the style and polished look that could've made us overlook these aspects.

Vijayakanth looks more presentable than in his recent endeavors and also acts more mature, as befits his age and role. But his girth has made him real slow and that is painfully obvious in the couple of hand-to-hand fights. Navneet Kaur is around mainly for the romance for the most part but gets to do her bit towards the end. Seril Brindo is underdressed considering her role of a Canadian policewoman and so its difficult for us to take her seriously. Biju Menon is rather bland as always.