This story begins with Chinna Vandu’s (Dhanush) brothers Paranjothi (Sriman) and Paranthavan (Sathyan), who are not yet married, despite their old age. Chinna Vandu, who studied in his uncle’s son home, falls in love with Vanaroja (Nazriya Nazim), who comes there to visit her grandmother (Sachu) and see the village festival. Chinna Vandu finds many ways to make Vanaroja fall in love, such as making her laugh, but she still does not fall in love with him. During the village festival, Vanaroja’s ring goes missing, so her father Poongavanam (Aadukalam Naren) comes there and tells everyone to find the ring for a reward of 1 lakh. Only Chinna Vandu finds it in front of Vanaroja, but he gives the ring to a poor lady to claim the prize, as Vanaroja does not like him. Seeing this, Vanaroja falls in love with him. Chinna Vandu makes a challenge to himself: to know whether Vanaroja’s in love or not. He gets to know that Vanaroja is also in love with him.
Vanaroja leaves the village to her home but upon reaching, she finds her father has arranged for her engagement with Krishna (Vamsi Krishna) and is getting married with Krishna on her birthday. Chinna Vandu comes to wish her for her birthday on that night and comes to know about the engagement. They both escape from Krishna and his henchmen. Chinna Vandu tells his cousin Soori (Soori) he has eloped with Vanaroja and asks him to come and meet them. Soori tries to find a way for Chinna Vandu to live with Vanaroja, but Chinna Vandu tells him he has already married her. Soori tells them to hide their marriage and go to his family in Kumbukonam. Soori brings Vanaroja to Chinna Vandu’s house, saying she is an orphan. His family accepts her in, but Chinna Vandu’s brothers start to love Vanaroja. Chinna Vandu comes there and makes sure his brothers do not marry her. After some days, their mother (Meera Krishnan) finds that Vanaroja is pregnant and throws her out of the house. Meanwhile, Krishna’s men find Vanaroja and kidnap her. Chinna Vandu finds Vanaroja captured by Krishna and follows him. He goes in a fight and wins, but Chinna Vandu is caught by his whole family, and his father Sambandham (Pyramid Natarajan) does not accept this, but Poongavanam comes and tells Sambandham that his daughter’s life needs to be happy, and so finally he accepts their relationship.

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

Thenali Soman (Kamal Haasan) is a Sri Lankan Tamil who has come to Chennai for psychiatric treatment because of numerous phobias caused by his trauma of the Sri Lankan Civil War. Panchabhootham (Delhi Ganesh) and his assistant (Ramesh Khanna), the doctors treating Thenali, are jealous of a relatively junior doctor Kailash (Jayaram) getting all the media attention. They send Thenali over to him, believing his failure to cure Thenali of his phobias will derail his success. Soon after their first appointment, Kailash heads to his home in Kodaikanal on a vacation with his wife Jalaja (Devayani) and his two children Arjun (Master Suraj) and Aishwarya (Baby Taj Nisha). Kailash tells Thenali to wait until after the vacation before his therapy can begin, but Panchabhootham asks for Thenali to go meet Kailash while on vacation.

Arjun (JAYAM Ravi), an unemployed youngster and Deva (Rahul Dev) a powerful don both fall in love with Sailaja (Shriya), a middle-class beauty, at the same time on a rainy day at a railway station. Arjun keeps bumping into Sailaja coincidentally every time it rains. This makes them both feel that it is perhaps the rain that keeps bringing them together, and they start to fall in love. Deva, on the other hand, takes the back-door route to get the girl, with the help of her good-for-nothing father (Kalabhavan Mani). After learning of the Arjun and Sailaja’s love, Deva and Sailaja’s father work up devious plans to break them up. And finally they succeed in creating a rift between the two lovers. Though Arjun realizes what is really happening, Sailaja falls prey to the foils of the Deva and her father. The young lovers part ways; Sailaja becomes a leading lady in the movies and Arjun works with his uncle in a quarry as a demolition expert. Deva is cheated out of some money by Sailaja’s father, and as revenge, he finds out where Sailaja now lives and kidnaps her from right under her parents’ noses. Sailaja’s father realizes that the only person who is daring enough and cares enough to get his daughter back is Arjun and goes to him with his pleas. It takes much convincing, but Arjun finally decides to rescue Sailaja but for reasons other than love. How successful is Arjun in rescuing Sailaja? Will Sailaja realize that Arjun was true in his love? Will they fall in love again?

The film opens with the ageing gangster, Singaperumal, forcing himself on a young girl, Subbu. He is unable to perform, and vents his anger by slapping the helpless Subbu. Singaperumal is the grand don of crime in Madras. His lieutenant, Pasupathi, brings a proposal. A large stash of cocaine, worth about ₹ 2 crore, has entered the city. The guy bringing the stash wants to sell it for ₹ 50 lakh. Pasupathi sees the immediate easy profit, as well as the long term benefit (to control the cocaine market with such a large supply) and the recognition that they are able to pull off such a deal. The drawback is that the stash really belongs to their arch-rival Gajendran. Singaperumal knows that Gajendran is a vicious and unpredictable adversary, and the venture is risky and likely to become messy. He decides to pass. Pasupathi dourly suggests Singaperumal is getting old and rusty. He asks Singaperumal to loan him the ₹ 50 lakh so he can do the job himself. Pasupathi is prepared to face the risks, and in return for the loan, he offers Singaperumal a cut of the profits. Singaperumal agrees to the loan, but, instead asks Pasupathi to first get the stash and then think of the profit distribution. The money for the loan is brought to Singaperumal.

The movie revolves around three old men. Ashok Lalwani alias Lali, (Anupam Kher) is not happy with his wife (Rati Agnihotri), who is a staunch believer of God and doesn’t spend time with him. Kamaldheer Sharma alias KD (Annu Kapoor) is a bachelor for some unknown reason, while Pinky (Piyush Mishra) is secretly in love with a young Chinese woman, who only knows English but he himself being uneducated, is unable to express his feelings. The three men plan a holiday to Mauritius to have some fun, where they meet Ahana (Lisa Haydon), who is a social networking addict and gets annoyed because her rival girls have more Facebook likes and her ex-boyfriend had been commenting and liking their posts and condemning her at the same time.

Santosh’s life is dictated by his father, who decides everything for him. However, when Santosh falls in love with a girl, he struggles to convince his father to let him marry his girlfriend.

Two friends come to Chennai from Madurai. Their lives take a turn when they are faced with one hurdle after another while living in the metro city.

Movie takes us into the world of a spirited youngster named Lallu and his colorful gang of friends.

The plot revolves around four young cousins. Things change once one of them gets married. Will this change the equation between them?

A conventional school reopens after a long break, only to face various problems within the premises. Now, the students must join hands to save their school.

A reformed thief’s fight for justice when an innocent act to defend himself places him in loggerheads with the high and mighty of society.