Arjun is rich. One day, his father sends him to attend some business work. On his way back to the airport he comes across a village called T. Vennure which is his best friend Shanmugam' village. On landing in the village, Arjun learns that Shanmugam has eloped with Rajeshwari, the daughter of Pasupathy, a rich landlord in the village who is hell bent to save his family's prestige always, and is missing from the past six months. After meeting Shanmugam's father and finding out some bitter truths about Shanmugam, Arjun decides to stay in the village and find his missing friend. A young lawyer named Yazhini assists him in his work. After finding a strong opposition from Pasupathy's son Saravanan / Jagapathi and Palani / Ram Babu, Arjun, along with his friend Venky and Yazhini, assembles all their college friends as a group along with the neighbor village youths as a group to find the mystery behind Shanmugam and Rajeshwari's absence from the village, only to learn that they were killed and buried at the grounds of a damaged monument. Arjun stays back there to find out the reason behind the couple's death. After finding help from Pasupathy's wife and daughter-in-law, Arjun files a case with the help of Yazhini. The case, though interrupted many times due to Saravanan / Jagapathi's men, including the town's police, remains steady due to the efforts of Arjun and his friends. A fine day, on the request of Pasupathy's wife, Palani / Ram Babu promises to help Arjun in the mystery. As promised, he helps them by narrating the incidents happened actually.

Palani starts telling the truths to Arjun, Yazhini, Venky, and their group. The night Rajeshwari eloped with Shanmugam, Pasupathy orders Saravanan and Palani to bring her back home. They find her with Shanmugam in a bus and take them to a rice godown. There, while Saravanan mercilessly thrashes Shanmugam, Rajeshwari stops him, holds Shanmugam's hand, and tells Saravanan that she cannot live without him. In a fit of rage, Saravanan cuts Rajeshwari's hand with a sword. While Palani could know what was happening, the couple is killed by Saravanan. Palani confesses the same in front of the magistrate, which leads her to issue an arrest warrant on Saravanan as well as Pasupathy, who was aware of the happenings. Saravanan, frustrated, goes on a killing spree to kill Arjun and his friend, only to be thrashed mercilessly by Arjun. Saravanan surrenders himself to the police, whereas Pasupathy shoots himself before the police reach him. The movie thus ends on a happy note with Arjun's friends returning to home and an injured Arjun talking to the media about the honor killing that took place there.

After knowing the truth from Ram Babu, Arjun and Venky rush to the court along with Ram Babu, only to be attacked by Jagapathi midway. A combat takes place between Arjun and Jagapathi, and while both were almost exhausted, Arjun's friends rush to the spot, thus making Jagapathi and his men escape from there. Now, Ram Babu and a blood-stained Arjun go to Pasupathy's home to tell the truth. Ram Babu starts narrating what happened. The night Rajeshwari eloped with Shankar, Pasupathy orders Jagapathi and Ram Babu to bring her back home. They find her with Shankar in a bus and take them to a cold storage. There, while Jagapathi mercilessly thrashes Shankar, Rajeshwari stops him, holds Shankar's hand, and tells Jagapathi that she cannot live without him. In a fit of rage, Jagapathi cuts Rajeshwari's hand with a sword. While Ram Babu could know what was happening, the couple is killed by Jagapathi. Pasupathy and his family, who were not at all aware about this, experience a bitter shock. Later on, Jagapathi arrives who confesses the truth, saying that he did it to save their family's prestige. A completely changed Pasupathy kills Jagapathi by shooting him after realizing his mistake. He then surrenders to the police voluntarily. Arjun, depressed by the events, is solaced by Shankar's father. This incident brings a change in the upper caste people and thus integrating themselves with the lower-caste people.