Thangam, a landlord who loves his sister, is forced to let her marry a man who impregnates her. However, when his sister is killed despite all his sacrifices, he vows to avenge her death.

Masilamani (Arjun) is an encounter specialist. His life gets intertwined in the fight between two rival groups when he vows revenge against those who killed his wife. How far will an honest police officer have to go to let justice triumph?

The story begins with Sarathy (Sundar) who is a tough and honest cop and given his straightforward nature, he is the thorn in the flesh for many antisocial elements and also the politicians. Due to this, he keeps getting transferred from time to time, however, Sarathy has no qualms about it since he is happily married with a lovely wife Ganga (Ragini). Sarathy's life however takes a turn when he arrests a corrupt MLA (G M Kumar) and his men which leads the politician to quit the field. He vows revenge and kills Ganga and their two children's and also frames Sarathy in a case. But his wife escapes and Sarathy admit her in a hospital in serious condition. From then on, he begins his corrupt acts and in such a way that the entire society begins to loathe the police force. Saami then strikes hard at the former MLA who kills Ganga and what happens from there forms the rest of the story.

Bhavani (Sneha), an honest police officer in Hyderabad, is posted as Assistant Commissioner of police in Tirunelveli upon the request of Tamil Nadu government. The town is controlled by Sivalingam (Kota Srinivasa Rao), a rich and influential baddie and an aspiring politician. He indulges in all unlawful activities.

Karunamurthy (Kitty) an honest man and the Home Minister of the state of Tamil Nadu is forced to help the terrorists to kill the Governor. Nethaaji (Sarathkumar) a journalist and a press owner runs a newspaper called 'India'. He comes to know that the Home Minister is involved in the Governor's murder and tries to investigate it. In the course of his investigation he too gets involved with the terrorists and is forced to kidnap the scientist Shivashankari. Now the police are out to get Nethaaji. Nethaaji runs from pillar to post to prove himself innocent. Will he be able to prove himself innocent? Will he be able to expose the sinister plans of the terrorists, or will he pay the prize for a crime which he never committed?