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.

The film begins with the young man Sakthivel (Ranjith) coming back to his village. At his return, he is respected and treated as God by the villagers, they call him Thirukkaval. Thirukkaval still hates his father Chettiar (Jaishankar), stepmother Azhamu (Kavitha), stepbrother and stepsister. The kind-hearted Thirukkaval quickly makes enemies including Munnumunuthan (Vasu Vikram), Kodumudi (Kazan Khan) and his father Chettiar. Meanwhile, Pasupathy (Ravi Shankar) and Chinna Pulla (Rajakumari) fall in love with each other. The affair is soon exposed, so Thirukkaval arranges their wedding. Shortly after, Pasupathy dies in an accident and the villagers blame the innocent Thirukkaval.
In the past, Thirukkaval lived happily with his father Chettiar, his mother Shenbaga Valli and his baby sister Chittu. Chettiar had an affair with Shenbaga Valli’s sister Azhamu and Azhamu became pregnant. Unable to bear the situation, Shenbaga Valli killed her baby daughter and committed suicide. The angry Thirukkaval injured his father’s foot and run away. He then became a child labourer to make a living.
Chinna Pulla’s mother Appayi (Manorama) passes away. Thereafter, Thirukkaval is accused of having an affair with the widow Chinna Pulla. What transpires next forms the rest of the story.

Based in Kancheepuram, Surya/Arjun makes a living as a con-man on the North Zone, and is assisted by his girlfriend, Baby; while the South side is presided over by Pashupati. When a Kolkata-based contractor hires the latter to kill District Collector Jaianand/Kishan, Surya decides to defend him – this results in his finding out that Jaianand is his look-alike. Jaianand’s terrified fiancée, Shanupriya, then hires Surya to not only protect but also impersonate Jaianand – a move that will drastically change everyone’s lives – especially when Kishan refuses to let anyone take his place.