Police Pandi (Soori) the owner of a real estate agency, borrows 15 lakhs from Vatti Varadhan (John Vijay), a local rowdy and don to start his business. Murugan (Vikram Prabhu) is Pandi’s assistant, and he gives the media an advertisement in which he persuades people to buy land from ‘his’ company, making many people persuaded from it. A billionaire wants to buy all the land, and when he is about the to sign the papers, they find out the land is actually a graveyard, causing the billionaire to not buy the land. When they are in the bar drinking alcohol, a call comes on Pandi’s phone. Murugan answers it, thinking it was the broker who sold them the land, but it was actually Varadhan. Murugan talks to Varadhan in foul language, and when he ends the call, Pandi tells him it was actually Varadhan. He then goes to another table and asks a man for some wine. The whole group befriends the man, who is mute.

Kannan is in love with his neighbor Revathy, whose father and uncles are the most dreaded goons in the village.

Two families stay in identical bungalows, adjacent to each other, tracing their friendship to over 40 years. Their respective progenies Chinna (Ajith Kumar) and Chella (Jyothika) are childhood buddies, their easy camaraderie and strong bonding carried over to their adult years. The two study in the same college, same class, zoom together on the motorbike, their togetherness at home and college, as accepted a fact as it was in films like Piriyadha Varam Vendum. Somewhere along the way, the duo falls in love, throwing some soft glances at each other when the other is not looking. Their college mate Karna (Yugendran), makes devious plans to separate the duo and make Chella his. He does not seem to have any running feud with Chinna, is quite friendly with the duo, and does not seem to be particularly in love with Chella. Chinna laps up all that Karna tells him about Chella loving him, and is heartbroken and goes out on a business trip. Chella, persuaded by both families to marry an NRI, boldly informs them that she loved Chinna and would marry him. The two families are happy. Chinna returns home and learns of the preparation for his engagement ceremony. Feeling that since Chella loved Karna, it must be family pressure that must have forced her to agree. Chinna then backs out. It is Chella’s turn to be indignant about Chinna’s mistrust of her love, and after giving him a piece of her mind, she backs out, with Chinna pleading for acceptance. After a period of separation, during which all ties between the two families are severed, Chella’s family soon come to realise that they cannot live without their dearest friends (and lover). The two families then reunite.

Dhinakar (Jai Akash), hailing from a middle-class family, and Nancy (Madhumitha), a software engineer and sole breadwinner for her family, are neighbors who are in love with each other. However, their dreams of getting married are shattered when their self-centered parents decide on proposals of their own choice. Notwithstanding the overbearing parental pressures, Nancy marries Victor (Prakash Raj), a multimillionaire businessman, while Dhinakar marries his cousin – but not before the lead pair enters into a sly pact. Dhinakar and Nancy contrive to marry the spouses chosen by their parents, only to officially dissolve their unhappy unions later and thereby pave way to their union. After a sequence of events, Nancy successfully convinces Victor about her unreserved enthusiasm for her past love, gets her divorce, and takes the first step towards making a fresh start, but events overtake her in an unexpected final act.

Saravanan (Udhayanidhi Stalin) is a jobless youth who roams around in a two-wheeler with his friends. Kalyanam (Soori), his uncle, aspires for a political career, but due to the error committed by a drunk photographer, Saravanan ends up as the local head of a national party, and this upsets Kalyanam, who is left with no option but to leave the country to take up a job in Dubai. His other uncle’s daughter Thaenmozhi (Regina Cassandra) returns to town after many years, and Saravanan is besotted by her and falls in love with her. In the meantime, Kalyanam returns and awaits an opportunity to teach a lesson to Saravanan. Whether Saravanan succeeds in his love and whether Kalyanam manages to put Saravanan in his place is told in the rest of the story.

A minister on his deathbed reveals to an MLA the whereabouts of billions in cash that he has stashed away. However, the minister’s relatives are vexed when the MLA loses his memory in an accident.

Sunil (Prabhu Deva) is one of the leading heart surgeons in the country. He lives with Ganpat (Mouli), who is also a doctor and is loved by everyone in the family. Sunitha (Jaya Seal) arrives with a kid who has a heart problem to the hospital. But she is shocked seeing Sunil there and lashes out when she learns he is the doctor who is about to treat the kid.
The movie goes for a flashback. Sunil’s brother Balaram (Sarathkumar) is a thug but does not want his brother to follow his footsteps, therefore sends him away to study. Sunitha and Sunil are classmates in a medical college and they both fall in love. Sunil expresses his wish of marrying Sunitha to Bala, for which he accepts. Meanwhile, Sunitha goes back to her village for her sister’s child’s ear piercing ceremony. Her sister’s husband is money-minded and tries to get Sunitha married to a rich man in return for money.

Priya confesses her love to Raja but he mistakenly falls for a girl with the same name. Years later, Priya re-enters his life and triggers a series of emotionally complicated situations.

A young woman is murdered right in front of a police station. The inspector at the station suspects her boyfriend, a private detective, who claims he is innocent.

A love story with boy and girl from feuding villages.

Billu (Jayam Ravi) is the son of Mudaliar (Vijayakumar). Mudaliar is much loved and respected by people of his locality, and Billu is almost like a foster son to every person in the locality.

Kutty is a good-hearted soul, but unfortunate incidents tend to portray his ruffian side whenever he encounters the girl he loves. A bizarre incident brings them closer and yet keeps them apart.