An underground terror group led by a mysterious proxy Akash recruits unemployed youth and turns them into suicide bombers. Asst. Commissioner of Police Parashuram (Arjun) decides to take the case (and the film) into his own hands in a fit of patriotic fervour. In a subsequent fit of wisdom, he hides a key witness (gayathri raghuram ) at the home of his flaky fiancée (Kiran), thereby endangering both and his anti-terror mission in general.

Some terrorists kidnap Sudha to take over her residence and save their boss, Robert. Karthick, a RAW agent disguises as a cook and comes to Sudha’s house to capture the whole gang.

Sridhar (Tarun) is a final year degree student and gets selected in the campus selections for studies abroad. He goes to Mumbai for an interview and in his return finds Preeti (Trisha) and loses his heart to her. Sridhar comes to know that Preeti was about to join in degree and Preeti learns that he was a final year degree student. Sridhar is an ardent cricket fan, so is Preeti, while Sridhar is also a good football player. The principal of the college appoints a coach called Reshma (Shriya), who is also a student, for the football team led by Sridhar. Sridhar tries his best to trace Preeti by visiting several women’s colleges, while Preeti also watches for Sridhar at the men’s college. Accidentally, Preeti helps Sridhar’s mother, when she had a heart attack. In order to find Preeti at any cost, Sridhar goes to the LB Stadium, where a cricket match is in progress and gets injuries in a bomb blast in the stadium. Just before the blast, both Preeti and Sridhar find each other but could not meet due to the blast.

DCP Paramaguru (Ajith Kumar) is an efficient police officer who fights with the scum of the society. He later masquerades as a thief to infiltrate into the underworld. The bad guys are surprised to find that Paramguru is the DCP, out to get them. So they all gang up against him. In this process, a thrilling encounter takes place between the good and the evil. Paramaguru is helped in his fight against injustice by Divya (Meera Jasmine) who falls in love with him.

Five college boys while away their time by going after girls and getting drunk at parties. However, they are forced to earn a living when one of them gets married against his parents’ wishes.

Childhood friends Venu and Anu are separated when Anu’s father is transferred to another town. They promise to meet each year at a temple on a hill, but they only meet after ten years as grownups.

Arumugham (Vikram) is an uneducated, good hearted, helpful village hick. Easwari (Jyothika) is his childhood friend. A chemical factory in the village pollutes the local river and when all attempts to stop the factory waste from going to the drinking water falls flat, the villagers decide to send Arumugham to Chennai and meet the concerned minister who has won from their constituency. He sets out for the city with Easwari and her grandmother and they stay with Arumugham’s friend (Vivek) and gang. Swapna (Reema Sen) is a model who stays in the same area and she lusts after Arumugham. They meet the Minister (Sayaji Shinde) who is extremely nice to them and promises to help them. Soon Arumugham is forced by circumstances to fight against an anti-social gang with a lady boss. An honest police officer (Manoj.K.Jayan) tries to collect evidence against the criminal gang. When Arumugham realizes that the bad guys are the henchmen of the same Minister who is behind all the crimes, !

Thennavan is a 2003 Indian Tamil action drama film written and directed by newcomer M. Nandakumaran and produced by Vijayakanth, who played the title role Thennavan IAS, in-charge as the Chief Election Commissioner and fight against corrupted politicians.The musical score by Yuvan Shankar Raja.The film released on 15 August 2003, coinciding with India’s Independence Day. It was later dubbed in Telugu as Election Commissioner.

Vinod survived physical and mental abuse in his childhood. When he falls in love with Divya, he gets so obsessed with her that he becomes willing to kill anyone who comes in her way.

Satya (Silambarasan) is the son of a police constable. He gets into fights and ends up in jail where his own father gets him out on bail. While he is returning home from a party drunk, a group of college students beat him up. That is when Suchitra (Rakshitha) comes and takes him to the hospital and gives blood. She is the daughter of a police commissioner. Later, Satya falls in love with Suchitra. That leads to several problems which are faced bravely by Satya in the later part of the film. Finally, all goes well, and Satya also receives the letter confirming his selection for IPS.

Parthiban (Srikant) is a young executive who has trouble keeping a job because of his adventurous nature. A young girl he sees at a bus-stop (Sneha) catches his fancy, and he quickly falls head over heels in love with her, when he finds remarkable similarities in their two personalities. Parthiban is then cajoled into “checking out” a girl for an arranged marriage, which he does reluctantly, only to find she turns out to be Sathya (Sneha), the girl he secretly admires. Elated, he agrees to a marriage. A bizarre twist follows immediately after.

Bhoopathy (Vijay) is a happy-go-lucky person who is very relaxed in life, as shown when he falls asleep in a train and misses his station. He goes to Villivakkam in search of Vishwanathan (Nassar), who is his father Mani’s (Manivannan) best friend. Kattabomman (Vadivelu) is Vishwanathan’s assistant who torments Bhoopathy right from the day they meet. Vishwanathan’s first daughter Priya (Sneha) initially hates Bhoopathy, and they are at constant loggerheads at each other. When Priya’s aunt (Suhasini Maniratnam) is going to leave, they again fight and the same old revenge story takes place. Soon, however, Priya falls for Bhoopathy. When Bhoopathy comes to know about this, he is reminded of his father’s words that he should not make him ask forgiveness to his friend under any circumstances. Although Bhoopathy also likes Priya, he controls his emotions and keeps silent. He tries to leave but is caught by Vishwanathan and is forced to come back. Priya receives a call from her friend to come to her wedding. On the insistence of Priya’s younger sister, Vishwanathan sends Bhoopathy along with them. There the groom Sriman (Sriman) makes him drunk and he reveals his feelings about Priya. They become friends soon. Then they all go to Black Thunder and a photographer (Pandiarajan) they meet takes a photo of Bhoopathy and Priya holding hands.

A spoiled young heiress marries a poor man in order to inherit her grandfather’s property.

Sajan Joseph Alukka (Kunchako Boban) is a soft-spoken and studious young man, while his junior Priyamvada (Meera Jasmine) is smart and outgoing. Her close friend is in love with Sajan, but he avoids her by saying that his only ambition in life is to study hard and become an IAS. But Priya follows him and digs out the truth that though he hails from a rich family, his father has now gone bankrupt and has no money even to pay the exam fee. On hearing this, her friend ditches him. Slowly Priya starts having a soft corner for him. She even pays his fees, but Sajan tries to avoid her and treats this as an insult.

Vinod’s parents want him to get married to Priya as she is madly in love with him. But she is unaware that Vinod is in love with his childhood friend Sandhya.