Kaasi learns the location of the people responsible for his parent's death and decides to seek revenge. However, unexpected circumstances cause Kaasi to become a gangster himself.

Due to his honesty and refusal to meet the demands of those in power, inspector Ramachandran is often transferred from one town to another. Soon, he finds himself in an area that is highly terrorised.

Arun falls in love at first sight with a bank cashier Seetha and follow her everywhere. Seetha refuses his love and tells him her past. In the past, Seetha was from a middle-class family. Seetha's brother-in-law was a jobless, and lived with them. Balu was a bank manager and falls in love with Seetha. Mani, Balu's father, a miser, looked for a rich daughter-in-law. Finally, Balu got married with Seetha and the same day, Balu died in a crossfire. So Mani refused to keep Seetha in his house. Later, without money, Mani begged Seetha to come with him and she took her late husband job. Seetha's brother-in-law took his wife's thaali and tied the thaali to Seetha. She immediately removed the thaali. Arun decides to marry her despite her past. The court cancels the marriage between Seetha and her brother-in-law. Seetha's sister kills her husband to save Seetha's marriage. At the end, Arun and Seetha get married.

Sakthivel, a village-based ruffian, is recruited by Sekar for a mission and is taught martial arts. Meanwhile, Shakthi falls in love with Anju, but realizes that his mission is linked to her.