A man and woman have been neighbors since they were children, but they have different perspectives on their relationship.

Palakattu Madhavan (Vivek) is a lazy, irresponsible man. Embarrassed his wife Lakshmi (Sonia Agarwal) earns more than him, he quits his job out of spite. He then adopts the old woman Pattu Maami (Sheela) as a surrogate mother because she offers to pay cash for the opportunity. The character “Palakkattu Madhavan” is also an acknowledgement of a character with the same name in the movie Antha Ezhu Naatkal starring Bhagyaraj and Ambika.

A happy-go-lucky man accidentally falls in love with a woman whose father despises him. To further complicate matters, his lover has another suitor, who is deemed more worthy of her.

A chance encounter of the unassuming bank receptionist Harleen Sahni with the charming yet mysterious Rajveer Nanda, results in an on-rush of ditched planes, car chases, shoot-outs, bombing raids and general global mayhem. But as the transcontinental chase ensues with Rajveer convincing Harleen that he’s the good guy, can she really trust him, and will trust matter when the bullets start flying?

The movie begins with the marriage of John (Arya) and Regina (Nayantara) at a church. The marriage is an arranged one, to which both have consented reluctantly to make their parents happy. After the marriage they live together as strangers in an apartment, where the neighbors are upset with John who comes home drunk every night, which he does deliberately to annoy Regina. Eventually, Regina applies for a transfer to Australia to stay away from John.

Inba’s college going granddaughter Ashmitha is suffering from a serious health problem and she is in need of money costing to amount of about 6 lakhs. Inba along with her close friends Twinkle and Lilly cooperate together to raise money and while depositing money in the bank, they end up losing it due to bank robbery led by a terrorist (Mansoor Ali Khan) and his gang. The bank manager (Chithra Lakshmanan) refuses to help the trio as the money was not deposited at the time of the robbery. Then they find themselves in under tremendous pressure to raise money to rescue Ashmitha and the grannies hatch a plan to rob the bank where they lost their money along with China (Manobala). Then police and media covers the bank. After a lot of struggle they come out safely. Afterwards they get to know Ashmita has no disease but is stuck in a big problem. The problem is a gang which takes bad videos of women and asks money. But the video of ashmita is uploaded for not giving money. How they save Ashmita’s life forms the rest of the plot.

Chinnadurai (Major Sundararajan) owns a huge estate that grows and processes tobacco and tea leaves. Due to advancing age, he is concerned about leaving control to his son, Kalyana (Kamal Hassan) and the cunning deceit of his manager, Ramiah (Thengai Srinivasan). Kalyana is immature and naive, and easily manipulated by the cook, Samipillai (V.K. Ramaswamy). He is also deeply in love with Shenbagam (Sridevi). Ramiah, Samipillai, Perumal (Senthamarai)(Shenbagam’s father), and Ligappa (a hired thug) plot to murder Chinnadurai and swindle the property from Kalyana. Ligappa mortally wounds Chinnadurai, and on his death bed he confesses to his son that he was born a twin, abandoned his first wife Rajulakshmi (Puspalatha)and his brother Raman (Kamal Hassan). After his father’s death, he conveys this information to the cook, who tells him he will go to Madras and bring his relatives home. Instead, Samipillai goes to a side show, and hires a married couple Rangamani (Manorama) and Kittu, to pretend to be the lost mother and son. One day the entire gang is in a room, laughing at how they had duped Kalyana and will steal everything. He overhears, and runs to tell the police. They chase after him and throw him off a cliff, observed by Shenbagam, who goes mad. Kalyana’s ghost travels to Madras and confides everything to his brother, Raman. He wants his brother to go home, exact revenge, and take care of Shenbagam…..

A local barber’s fate turns overnight when he becomes the single deciding vote in the village elections.

In order to help their boss from a financial crisis, Arjun and Archana manage to find a baby for a crucial ad campaign. However, they are shocked when they learn that the baby is an abductee.

A hitman turns against his boss in order to save his brother.

Gandhi is an IT guy who suffers from Pseudobulbar, and he uncontrollably laughs during stressful moments. He is taken to a Shiva temple and tied with a holy ornament, which is very strong, but it would bring a threat to him if separated.

Robbers steal money from three brothers who are gangsters and enter a bungalow. The gangsters chase them, and after getting in, they all have to figure out how to come out from the bungalow.