Shiva and Gautam are buddies and HR professionals in the same firm. Gautam’s insatiable thirst for wooing women, leads him to abuse a bank marketing call that Shiva receives. Madhu, a miffed friend of the woman in the receiving end, starts to taunt Shiva by making prank calls which later blossoms into real romance just over the phone without having seen each other. When they feel the time is right to meet and communicate their mutual love, Madhu gets entangled in the bad books of a deadly organized crime syndicate. Her struggle to wriggle out of this with the help of Shiva and his friends is what forms the rest of the story.

Shiva, the main hero played by newcomer Sethu, enters as a police officer with the name tag reading R. Alexpandian. This is intended to be a spoof to the movie Alex Pandian, which released two days earlier and also included Santhanam as part of the cast.
Shiva (Sethu), Kaalkattu Kaliyaperumal (Santhanam), and Power Kumar (Srinivasan) are three friends with no occupation other than getting drunk and chasing girls. A pretty girl named Sowmiya (Vishaka) moves in with her family to the house opposite Shiva. The three friends fall for the girl’s beauty and make a gentlemen’s agreement to let the girl choose her boyfriend. The three attempt different methods to woo her. Shiva helps Sowmiya’s aunt (Kovai Sarala) in household work; Kaliyaperumal joins Sowmiya’s uncle (Ganesh) to learn singing; Power joins Sowmiya’s father (K. Sivasankar) to learn Bharatanatyam. One day, when none of her other family members are home, the three eventually profess their love, leaving Sowmiya confused.

A young man from a community of robbers aspires to become a cop and acts as an informer. However, the local inspector and a minister are keen to see him out of their way.

A RPF railway officer Williams (Aruldoss) is miffed and frustrated regarding the fact that the public did not respect the RPF cops. He decides to bring in strict rules and asks his subordinates not to show mercy towards defaulters who make offences and for those who mess up with the railway rules. With the help of his team, he nabs many passengers who violate rules in different ways, which include peeing on railway tracks and travelling on train without a ticket. On the other hand, Sathya (Sachin Mani) is a jobless man who falls in love with a girl called Megala (Nandita Swetha), who is from a rich family and holds a job for herself. Megala also falls in love with him, which was not tolerated by her father and suddenly arranges for a marriage to his daughter.[6] When Sathya gets to know about this, he urgently prepared himself to travel by train from Pondicherry to Puducherry in order to convince Megala from the arranged marriage and to marry her, but his dreams were spoilt by Williams as he was arrested by cops on his way for committing an offence and was taken into custody at Tambaram railway station.[7] Then he meets prisoners Baskar (Sendrayan), Kunjitha Badham (Manobala), Kutti Puli (Arunraja Kamaraj), Sathish (Appukutty), and Kodeeswaran (Mayilsamy) and narrates his love story to them. After being impressed by the story, the prisoners hatch a plan to help Sathya to escape from police custody.[8]

The film begins with a trio of friends in college (Malar, Mona, Gayathri). Mona falls in love with Karthik (Shiv Pandit) despite the advice of Malar (Manasi Parekh Gohil) who suspects Karthik to be a complete flirt. One day, while on a date, Mona mentions to Karthik, Malar’s views about him and this gets Karthik to start disliking Malar for interfering in his love life. When Karthik calls Mona, Malar picks the call up accidentally and they get into an argument with Karthik venting out his anger towards her interfering in his love life. Shortly later, he breaks up with Mona. Gayathri believing Mona was a wrong choice in Karthik’s life begins to date Karthik, while Malar is firmly against it. The relationship ends the same way as his relationship with Mona. A year or two later both Karthik and Malar work at the same software company on different floors in the same building. One day, while trying to call his friend on Malar’s floor, he accidentally calls Malar and the two realize their identities and presence in the building and the age-old feud resumes. Over lunch, both Malar’s friend (Vicky) and his own friend (Suja) advise him to sort it with Malar. Vicky questions why Karthik would fight with such a beautiful woman as Malar. Karthik not knowing what Malar looks like decides to take a look at her. When he sees Malar he falls in love at first sight, he then tries to reconcile with Malar, but Malar is not willing to forgive a flirt like Karthik. Karthik becomes desperate and begins to follow Malar and in a chance meeting orchestrated by Karthik he introduces himself as a sweet and kind person by the name of ‘Sundar’. Malar who has never met Karthik face to face, believes his false identity and begins to open up to Sundar.

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.

Siva (Nakul) is a nice guy who doesn’t believe in the concept of love. True to his hatred, he also doesn’t hesitate to go and break up love birds. Pooja (Poorna) on the other hand believes strongly in the force of love and does whatever she can to ensure that lovers get united. The story takes a turn when Siva’s sister falls in love with Pooja’s cousin. As expected, Siva tries to break the couple while Pooja unites them. Finally, Siva gives up and at the same time, he develops feelings for Pooja. What happens from there forms the rest of the story.

Hari (Naga Shaurya)’s fascination is fights and disputes. He is always involved in one or the other fight just for the sake of it. In an interesting scenario, Hari is sent to a village called Tiruppuram where Telugu people, headed by Keshava (Achyuth Kumar) and Tamil people, led by Veera Muththu (Mime Gopi) fight with each other.

A man (Ranveer Singh) from a crime family falls in love with a woman (Deepika Padukone) who is resistant to her family’s choice of a husband for her.

Two retired colonels are at loggerheads with each other because one of them had been a traitor to the country. The grandson of the traitor and the grand-daughter of the other colonel fall in love but have to surmount a number of obstacles, including the one created by the girl’s grandpa, before uniting in matrimony. There is also a Brahmin’s daughter who loves the coloned’s grandson. In the end, the Brahmin’s daughter sacrifices her life to save her beloved. The traitor colonel also atones for his treachery.

A plastic surgeon’s life turns upside down after he replaces his wife’s face to his ex-girlfriend. Things blow out unusually leading to a big issue ending in courtroom drama.