The film is set in North Madras area where a Settu (Atul Kulkarni) used to employ Guna (Sampath Raj) for car seizure before he is double crossed by Burma (Michael Thangadurai), who takes over the hot-seat. Burma is aided by his girlfriend Kalpana (Reshmi Menon) and sidekick Boomer (Karthik Sabesh). Their mission is to seize 28 cars for Settu and raise money so that Burma can marry Kalpana. Meanwhile another gang of robbers led by a lady killer gets involved, leading to chase, abduction, double cross and killing.

Despite the premise offering the opportunity to narrate this story as a gritty action drama, Rajkumar chooses to tell it in a lighter, satirical vein.

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.

The film travels through 7 phases of a boy’s and girl’s life.

Pandi And his friends comes across a deaf woman Kadhambari (Nayantara) and Pandi immediately falls in love with her. Kadhambari is the daughter of a sincere police officer Ravikumar (Azhagam Perumal)because his father loves police profession, who is in pursuit of Killivallavan aka Killi (Parthiban), a dreaded gangster and politician who had killed Ravikumar’s wife and had caused Kadhambari to lose her hearing in her childhood. Kadhambari seeks Pandi’s help in finding her father, who has not spoken to her for the past two days, to which he agrees. Pandi soon learns that Ravikumar had been killed by Killi, but hides the matter from Kadhambari as it would make her upset. But Kadhambari learns about her father’s death from Meena Kumari and is determined to revenge his death by going after Killi and killing him. Pandi agrees to help her in her mission, with the promise that he will hold Killi’s shoulders while she stabs him.

“National” Selvam is a small-time photographer who lives with his father “National” Shanmugham. They run a digital photography studio in their small town. Next to the studio is a flex-board printing shop owned by Selvam’s friend Sadha. His assistant Vigadakavi is a photoshop wizard who designs the flex-boards. Selvam is in a relationship with Shenbaghavalli, his high school sweetheart.

Shakti (Madhavan) is a young man from a village with no job but much ambition and dreams. As he sees his life pass him by, stuck in a rut in his hometown, he decides that he will try his fortunes elsewhere. Chennai beckons him and off goes Shakti to join his uncle Kirikalam (Vadivelu), who has a stall of magic tricks at an exhibition. Kirikalam is not really a magician, but is posing as one, and his amateurish tricks don’t exactly bring in big crowds.
Next door to Shakti and Kirikalam’s stall though, is one ever-populated with visitors. The reason: it’s an all-girls stand, with mermaid costumes as the theme. Velli (Reema Sen) is the ‘head mermaid’ at this stall run by her sister, and bitter quarrels between her and Shakti ensue, when he feels that she and her team are unfairly taking their customers away, and she has this impression of him being an unsavory character. This misunderstanding is seen at different occasions where Velli and Shakti just happen to be in the wrong place at the wrong time — be it when Shakti gets off the bus from his village, asks for directions and is told to follow Velli, walking in the distance (Velli thinks he’s a womaniser) or when Shakti finally catches up with a miscreant who had picked his pocket and demands his money back — only Velli walks into the scene only at the demanding part. This whole collage of scenes is animated, with Kirikalam and Shakti trying to woo customers back to their stall, Shakti and Velli getting into arguments, and a general state of “fun” ruckus. Of course, love has been brewing as an undercurrent between the two young people.

Arun, a struggling theatre artiste, and his friends start a website that helps men to unite with the women of their dreams. Everything turns upside down when Arun has to put his own love at risk.

Follows a taxi driver who picks up a girl while he is on the run and ends up in a crazy roller-coaster of events.

When Mani, a lineworker who is unhappy in his marriage, manages to make a time machine work due to an accident, he goes back in time to change his life.

The film revolves around Karthik a happy-go-lucky youngster who is obsessed with astrology. One day, he and his friend come across a drug dealer which lands them in trouble.

A couple of people fighting amongst themselves to find a long lost treasure.