CBI officer Kasi gets tasked to investigate the disappearance of a judge. However, when he finds the culprits, who are three corrupt policemen, they get killed one by one and Kasi gets framed for it.

Arjun and Anu fall in love with each other on a train journey. When Anu's father learns about their relationship, he remembers that he shares an unpleasant history with Arjun's father.

Three friends, who experienced love failure, go on a trip with another friend of theirs to make his affair a successful one.

Kathirvel Murugan (Bharath) is a software engineer in Chennai. He shares his room with friend Sakkarai (Santhanam). Kathir hails from Usilampatti but wants to project him as city-bred and his ambition is to settle in USA. Kathir's father Sevaka Pandian (Sampathraj) is against his son's attitude. An influential local chieftain, he is against inter-caste marriage and love. Kathir meets Nisha (Rima Kaleengal), who too wants to go abroad. The latter loses her passport and Kathir helps her find it. Slowly Kathir falls for her. Meanwhile, Sevaka Pandian arranges for his son's wedding with a High Court judge's daughter. In the meantime, Kathir and Nisha get their visa and get ready to leave together for USA. The former thinks that he has escaped from his marriage and when he wants to propose to Nisha, he gets a rude shock. She informs him that she is going to USA for her marriage. What happens after this forms the rest of the plot.

Kathavarayan, an illegal liquor dealer, faces trouble when a student, who vows to expose those who flout the laws, gets him arrested.

A man, who lives in the slums, is infamous for harassing people. He is unaware that the people hate him. When he finally realises this, he decides to transform himself completely.

The main lead of the film is a bodyguard for his village and falls in love with simple girl who lives in the same village.

Five friends go on an adventurous trip just before one among them is about to get married. However, post an entire night of partying, they are shocked to find one of their friends missing.

As the state's cops eliminate the underlings of Daniel, one of the masterminds of the 2008 Mumbai terror attacks, there comes a challenger — Thalaivan, who starts committing crimes under their noses. Who is this mysterious man and what is his objective?

Two school students find their classmate murdered in their classroom and decide to track down the killer.