Subramani (Murali), the college leader, falls in love with Meenakshi (Ranjitha), but she requests him to complete her challenges to accept his love. Subramani succeeds her challenges, and when she asks him to kiss her in public, he is arrested by a police officer (Radha Ravi). Aruchami (Vijayakanth), Subramani’s brother, the respected village chief, lives with Thayamma (Revathi).
In the past, Subramani’s mother died during Subramani’s childbirth. Aruchami and Thayamma got engaged when they were children. They stayed unmarried to take care of Subramani.
Subramani is later released from jail. Meenakshi’s uncle (Kazan Khan) wants to marry her, and he then beats up Aruchami. Later, Thayamma decides to work in Meenakshi’s house to spy on her. Meenakshi admits to Thayamma that she is in love with Subramani. Meenakshi’s uncle agrees for Meenakshi and Subramani’s marriage. Finally, Subramani and Meenakshi get married, but they discover that Thayamma has died.

When a series of murders take place amidst the shooting of a movie,the CBI begin to suspect eccentric film director Rana to be a serial killer.

Amavasai (Sathyaraj), homeless but egotistical, gets acquainted to politician Manimaran, then MLA of the Palladam constituency, near Tirupur (Manivannan). Amavasai helps Mani with some petty tasks during election campaign and meetings. Amavasai grows into a well acclaimed helper and first associate for Mani. Meanwhile, Amavasai falls in love with Thayamma (Kasthuri) and one day he gives her some drug making her groggy and then rapes her. Mani instructs Amavasai to stand for MLA election as independent candidate in the upcoming general election with his support as Mani was not given his party ticket. Amavasai wins by a huge margin and becomes the MLA. He forgets his relationship with Thayamma and rejects her pregnancy and child. Thayamma and her parents move out of that village to avoid humiliation. Soon Thayamma gives birth to a boy and dies. Amavasai forgets Mani’s help and forces him in a role under him. He changes his name to Nagaraja Cholan for gaining social status. He marries the only daughter of the rich local landlord, Sivakami (Sujatha) and even cheats him of his palace. Over the years, Amavasai grows into a highly influential and corrupt politician with high criminal affluence. He builds a strong political empire through shortcuts. His ego and pride to remain in power make him kill many. He wins and remains as MLA of Palladam in all the general elections for next 20 years.
Now, Amavasai’s son Thangavel (also Sathyaraj) through Thayamma comes out as a new police constable, who is deputed in Amavasai’s constituency. Thangavel is betrothed to a beautiful +2 studying girl Kuyili. They both fall in love. But during the official wedding engagement, a dispute arises over the people asking about his father’s identity and the wedding is cancelled. He asks his grandparents about his father, but they remain silent. So he accuses his mother to be a slut, and his granddad bashes him and tells all about Ammavasai. Thangavel now comes to know of his real father and about his betrayal of his mother and also his corrupt practices. The state assembly is about to be dissolved prior to general elections. But the ruling party leadership does not wish to give a seat to Amavasai again, as he has minimal chances of winning, due to his corruption, illegal activities as MLA. So he invokes a cruel caste riot in his constituency and pretends to stop it. So he is given the ticket again. Thangavel is posted as riot police head constable to stop riots and to protect Ammavasai. He saves Ammavasai from an assassination attempt. He then goes to Ammavasai’s house and reveals his identity. He challenges his father that he will stop all of his illegal activities. Then Thangavel gets posted as Law and Order Sub-Inspector in the same area. The story further revolves around how Amavasai and Thangavel proceed in their battle and finally who wins the battle.

The film portrays the story of Ravi, a bandmaster by profession, who leads a happy and self contented life, until he falls in love with a minister’s daughter.