The story, set in the backdrop of Nallore, a small town in Thoothukudi District, revolves around Sub-Inspector Durai Singam, a brave and just policeman who serves in his hometown primarily to fulfill his father’s wish. Durai Singam settles every dispute in his town patiently with his words of wisdom and resorts to force only when the situation demands it. Kavya, a city girl who comes on vacation to Nallore, falls in love with Durai Singam. Erimalai, Durai Singam's bumbling colleague and friend, often accompanies him.
After his encounter with a chirpy girl, Anjali, during their train journey, a depressed Sakthivel's attitude towards life changes. Though he is attracted to her, he agrees to help her unite with her lover.
Shiva, the ageing business tycoon, bound to his wheelchair, sharing a strong bonding with his son Vishnu. Indulgent, while Vishnu whiles away his time with his cronies taking life easy. But then suddenly Vishnu starts behaving out of character, his drunken bouts and acts causing the father much shame and embarrassment. And when Vishnu professes to remember nothing of what he had done, the father takes him to a psychiatrist.
Muthu Pandi, a village strongman, decides to marry Dhanalakshmi, and begins his quest by eliminating everyone who opposes their union - starting with both her brothers. In desperation, Dhanalakshmi decides to escape from the village, and in the process is unwittingly assisted by a university Kabaddi player Velu.
On his wedding day, Shiva (Vijay) discovers that his cousin and bride, Aruna, has run away because she does not want to marry a cook. But he takes it lightly and moves to Chennai with the girl's brother (Shyam Ganesh) to look for a job. One night, he saves Sandya from some goons. In gratitude, she kisses him. Shiva starts to fall in love with Sandya. After several occasions where they bumped into each other, Shiva harbours hope that she too reciprocates his affections.
Velu's only dream is to become a police officer. One night after having dinner at a restaurant near the beach, Velu goes to pay the bill leaving his girlfriend Asha behind. At that moment, a police officer drinks and urinates besides Asha. Irritated, she scolds him. He attempts to rape her but is beaten up by Velu severely and receives a scar on his face. Angered by this, he seeks revenge against Velu.
Surya (Ajith) has been brought up in the army barracks in Ooty, ever since his mother(Sukanya) handed him over as a baby to a brigadier (Nasser). She tells the officer the reason for her action but the audience is not allowed to hear it at this point. Surya grows up to be a patriotic youth and the best soldier in his class. He falls in love with Indu (Simran), the daughter of an army officer. Indu's parents accept her choice of husband but soon after, her father dies in a bomb blast while her mother loses her life on seeing her husband's body. Not wishing to lose her husband too in war, Indu asks Surya to choose between her and the army.
A man struggles to deny his attraction to his twin brother's new bride.
Kamali loses her bag in the railway station. Later, her bag is sent to her home, along with a letter from Surya, who found it. Kamali and Surya send letters to each other and soon fall in love.
The story concerns Muthu, a charismatic, well-respected and loyal servant and charioteer of Raja Malayasimman, a wealthy zamindar. While Muthu and Raja's exploits lead them to fall in love with the same woman, an actress and dancer named Ranganayaki, Raja's materal uncle Ambalathar is keen on assuming control of the family's property.
Veerapathran, a dacoit keeps evading the cops. Prasath, an agricultural officer falls in love with Parvathy, a relative of Veera. She is horrified when he reveals his true identity and motive.