Siva(Prashanth) is admitted to a medical college in Chennai and his father(Rajesh), a police constable, gets a tranfer to Chennai too so that he can keep an eye on Siva. He develops a liking towards Mahalakshmi(Sneha), his collegemate. But Naga(Subburaj), Maha's servantmaid's son, is obsessed with making Maha his own.

The movie starts with Prashanth being chided by his father for being a good-for-nothing who gets himself into trouble, a fight sequence where Prashanth saves a girl from some rowdies and a group dance with the same girl. These three sequences are enough to make it clear that both the director's and Prashanth's ambitions are limited to making a masala film that sticks to Well-worn Tamil cinema situations. Consequently, our expectations are not too high as we settle back to watch the movie. But the movie does manage to get the ingredients for the masala formula right. With a nice romance, a dislikable villain and well-choreographed stunt sequences, Aayudham traverses a well-travelled route but keeps us engaged most of the way.

The romance between Prashanth and Sneha has a very funny and cute start as they both believe the other to be deaf and mute. And the necessary characters have been developed around them to make the scenario seem believable. Considering the poor state of the romance after they have professed their love for each other, one wishes this scenario had played out for a while longer. The movie's direction becomes predictable once Subburaj makes his appearance as the man obsessed with Sneha. His character is a mix of other screen villains from movies like Jayam and Gilli . But it is a little difficult to swallow when he maims and kills with disdain but waits for Sneha's approval to wed her. Wouldnt a man as evil as him simply marry her with brute force?!

As expected, its all action once Subburaj gets wind of Sheha's closeness to Prashanth. But the action never moves into high-gear since Prashanth and Subburaj don't meet till the end. He is forced to tackle Subburaj's goondas for the most part. Its not all brawn and there's a little brain too as Prashanth is arrested and then has to deal with a politician and a policeman who are on Subburaj's payroll. The climax is mounted quite grandly in the factory with the fire adding to the grandness.

Prashanth looks handsome and fights with vigor. Sneha looks good too and once again proves her ability to act naturally even in a masala movie(note her expression once Prashanth yanks off the chain). Subburaj makes a good villain and doesn't overact. Vadivelu's comedy track has a few scattered laughs(like the surprise he encounters in Prashanth's wallet after he swipes it) but his character proves his usefulness later. Janakaraj makes an appearance as Subburaj's righthand man and surprisingly, has no traces of comedy in his role. Songs are in typical Deva-style(i.e. they are quite unmemorable) and the sequence where foreigners wear dresses and dance like the usual group dancers seems quite silly.