Sachein (Vijay), a carefree and happy going guy joins a college in Ooty and falls for Shalini (Genelia) immediately on seeing her in first sight. Shalini studies in the same college as Sachein and is considered a popular and beautiful student, while also being a short tempered and arrogant girl with an upper-middle class status. Sachein comes to know all of this information about her from Arnold aka Ayyasamy (Vadivelu), who is a guy that studies in the college for about nine years and keeps studying there because he thinks that students should give their respect to their college professors, while also informing Sachein, that there are so many boys trying to impress her. This makes Sachein take a different route and he starts mocking Shalini in front of her, which irritates her. Slowly, they both become good friends, after Sachein saved her father in a bike accident. Santhanam (N. Santhanam), who is another student in the college also loves Shalini. But, he feels jealous seeing her and Sachein being good friends and decides to separate them. Santhanam writes in one of the walls of the college, that Sachein loves Shalini and this angers Shalini, as she misunderstands that only Sachein has done it. Shalini shouts at Sachein, but Sachein informs Shalini, that he is so outspoken and does not want to write in the college wall to convey his love, which makes Shalini realize her mistake.
But to her surprise, Sachein informs that, although he has not written it, but the content present on the wall is true which means that he is in love with Shalini. This again angers Shalini and she shouts at him that she considered him only as a good friend and that she wasn’t in love with him. Later, Shalini overhears Sachein challenging Santhanam that Shalini will convey her love within the next thirty days, as their college years will be completed by then. Shalini challenges Sachein that she will never fall in love with him.
Manju (Bipasha Basu) is also from the same college and she likes Sachein. Shalini gets jealous when she spots Sachein and Manju together often. But Manju informs Shalini that Sachein loves Shalini so much and asks her not to hide her feelings, as it is very evident that Shalini too likes Sachein. This makes Shalini realize her love towards Sachein. Sachein comes to know that Shalini’s parents have arranged a wedding for her and he meets Shalini on the last day of their college and says that he has lost the challenge and he will be leaving Ooty tomorrow. But Shalini hides her feelings towards Sachein and she plans to propose her love the next day as she wants to win the challenge by not conveying her love within the 30 days.
On the 31st day, Shalini is excited and goes to propose Sachein. But suddenly, she meets Gowtham (Raghuvaran) on the way, who is Sachein’s father. Gowtham is a billionaire, in which this fact makes the entire college be surprised that Sachein is the only son of a rich business tycoon, as Sachein always stays very simple and down to earth. Now Shalini feels bad, that if she proposes her love towards Sachein at this moment, then he might misunderstand that she decided to marry him after knowing that he is so rich and decides to stay calm. Sachein leaves to the Coimbatore International Airport in Coimbatore and Shalini also follows him. In the airport, Shalini could not control her emotions and proposes to Sachein. She also revealed that it is her ego that didn’t let her convey her love during the last thirty days. Sachein feels so happy and the couple are united.

An oil platform dramatically goes down on the Norwegian coast, and researchers try to find out what happened when they realize this is just the start of something even more serious.

Karky (Pa. Vijay) is the son of Arokkyasami (Nassar), who wants to win freedom of his people from the shipbuilding owner Rajanayagam (Suman) and his wife Sena (Namitha). Meera (Meera Jasmine) is Rajanayagam’s sister. She is a very kindhearted woman who helps Karky. With Meera’s help, Karky starts a war against Rajanayagam. Rajayanagam is not only cruel and stone-hearted, but also very cunning and a big fraud. He and his wife play a cunning game and cheat Karky. Karky’s mother Valliammai (Kushboo) is initially reluctant to wage war against evil openly as she is afraid of bloodshed. She wanted all workers to live and not die. Rajanayagam crosses all the levels of cruelty. There is no way the situation can be handled peacefully, so Valliammai asks Karky to open a full-fledged war against evil. Then the final war starts between good and evil in which good wins over evil.

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

A man raised by gangsters tries to reform them, and a hired job to protect a village presents him with the perfect opportunity.

Karan (Shahid Kapoor) is a shy and nerdy canteen boy and college student, running a café with his friend Murugan (Johnny Lever), and Tanya (Rimi Sen) is a student in the same college. She is the most popular girl on campus. Karan is in love with Tanya but is too shy to tell her. After he musters some courage and rescues her step-brother from some goons, he catches her attention and is eventually able to invite her to a fake birthday party. On her way there, Tanya witnesses the murder of a scientist, Khurana (Om Puri) by his evil twin brother, the underworld don Mehboob, and as a result is forced to flee the country to save her own life, since the law had been bought out by the very same killers. The scientist had stored a secret code in a stuffed toy, a parrot, now being sought by Mehboob, and Khurana was able to hide the toy in Tanya’s car before being killed. Unawares, Tanya leaves the toy at home before fleeing the country, and the toy is later picked up by Karan, ignorant of Tanya’s fate.

Jeeva (Murali) is the college boy cum singer (with bundles of commitments belonging to the lower middle class) who enchants the rich college girl Kausalya (Kausalya) (new face – with girl next door looks) with his musical skills. Kausalya the music buff who is in the habit of appreciating good singers over the phone, does it with Murali also. The telephonic voice of Kausalya turns out to have a tremendously magical romantic effect upon the hero, who besides falling in love head over heel, with her wants to see her.

The story follows a recent divorcee who spends her daily commute fantasizing about a seemingly perfect couple who live in a house that her train passes daily, but something shocking happens there one day.

Four immigrants (Pandi, Murugan, Afsal and Kumar) are detained by the local state police, tortured and forced to admit to a crime they have no knowledge of. When all hope seems to be lost, a policeman from their hometown speaks on their behalf at the court hearing, setting them free. The policeman asks for a return favor and the boys oblige, oblivious to the consequences that await them. As they unwittingly bear witness to a political treason, the system seeks to silence them at any cost. But Pandi is determined to be heard.

After losing their first child in an accident, a couple moves to a palatial home, where their young daughter comes under the spell of an eerie spirit.

While returning from a gang violence, twelve local gangsters are baffled to find a stranger in their van. His presence and actions evokes suspicion. What will happen next?

Ekambaram is a don in Thanjavur who smuggles expensive idols and artifacts. Sundaram is one of his worker and a long time friend. Sundaram has a son, Kathir, who is a cab driver in Chennai. One day, Kathir once goes to a girl named Viji for her hand in marriage, only to be rejected by her father, as he comes to know that Sundaram’s father works for the local don, Ekambaram. In the ensuing conflict, Kathir slaps Viji’s father and leaves. However, he still proposes to Viji.