The film has a deceptively casual beginning: a middle-class family consisting of parents (Kuyili and Ponvannan), a daughter and twin sons—Shiva (Jiiva), who works in a fish-market and Ashok Kumar (Jiiva, again), who is a lawyer. Shiva is a typical hero who attacks baddies with his bare fists; a rugged man who’ll brook no injustice. Devout Ashok’s goodness is a facade that hides his evil womanizing nature. Both have romantic interests; Shweta (Divya Spandana) is Shiva’s long-time sweetheart. Ashok’s life is one long, lustful journey as he charms every woman he meets into his bed. This is where the tale picks up. Shiva can do nothing right as far as his parents are concerned; they trust the Ashok and always misunderstand Shiva’s righteous anger and his every attempt to show up his Machiavellian twin fails. Ashok, on the other hand, is pally with the local goons and uses his brains to assist them in their nefarious activities. Matters come to a head when Ashok lures a girl called Gayatri (Honey Rose) with false pretences, ends up in having sex with her and eventually causing her to suicide when he learns that she becomes pregnant. Shiva lodges a complaint on Ashok but this fails as he couldn’t prove that whether it was him or Ashok who did the crime due to their faces. Shiva comes to know that a security man who saw Ashok pushing Gayatri from the roof. He tells the security man to meet him in the evening. But he is killed by Ashok as the security man saw him in the evening and thought him as Shiva. Shiva comes to know this thus begins a cat-and-mouse game between the siblings. This causes anger to the younger one and he tries to kill his elder brother. He employs a gang to kill his elder brother. Eventually the elder brother knows this plot and confronts him. During the fight the younger brother get killed by his own man. The elder brother walks with his father who for the first time accepts him.

An ambitious Gunjan Saxena eyes becoming a pilot after being drawn by the idea of a life in a cockpit. Despite facing reservations, she fulfils her dream and serves the country in the Kargil War.

Pugazh, a young man, fights against a corrupt politician who wants to acquire the playground of his area, which he and his friends use for sports activities.

Karunamurthy (Kitty), an honest Home Minister is forced to help terrorists kill the current Governor to save his daughter Priya (Lisa Ray). Nethaji (Sarath Kumar), an upright journalist, runs a newspaper called ‘India’. He falls in love with Priya. Baba (Babu Antony) is a terrorist who smuggles arms with his right-hand Dharma (Vimalraj). Nethaji saves the scientist Shivashankari (Manimala) from terrorists, and Charan (Charan Raj), a police officer, congrats him and arrests Baba. Dharma hurts Nethaji’s sister and Ammu, and later kidnaps the latter. Dharma threatens Nethaji to kill Ammu, and Nethaji is forced to kidnap Shivashankari. Nethaji kidnaps her and saves his niece, and later, Charan arrests him. The rest of story is how he will be able to prove himself innocent and punish the terrorists.

The film opens with Thiruthani (Bharath) beating up men who cause trouble to his sister for celebrating Diwali. Duraipandi (Rajkiran), an ex-military officer, watches the fight along with many others. However, Duraipandi becomes furious when Thiruthani refuses to save an athlete from having his leg broken despite his pleas for help. It is here that Thiruthani justifies his actions saying that everyone stood watching as his unconscious mother was left locked up in a burning building for fear that they would be killed by the local rowdies. Meanwhile, Thiruthani falls for Sugeesha (Sunaina), an orphan who goal in life is to marry a person with a large family. Soon, Thiruthani gets involved in an accident causing severe damages to his skull. The doctor privately tells him that he would only live for six months. Unable to bear the thought of his family being depressed upon his death, he becomes harsh with them, believing this would make them hate him. Seeing this, Duraipandi advises that he should kill the local rowdies so that everyone can live peacefully and that he will not face jail as he is about to die. As time passes, Thiruthani becomes one of the most wanted criminals. Shocked at this news, the doctor informs Thiruthani that he lied only because of Duraipandi’s request. Furious, Thiruthani advances on Duraipandi only to find out that the latter has lost one leg in the Army. The climax shows Duraipandi taking the blame for the murders (as no one has seen Thiruthani) and getting shot.

Murugappa ‘Munaruna’ (Dhanush) is a Tamil worker in 1960s Burma. His friend Saamuda falls in love with Mallika, but Mallika loves Munaruna. Munaruna saves Samudra (Amyra Dastur), the daughter of a Burmese army general, from a Ferris wheel accident and they fall in love. When Mallika learns about this, she is devastated and marries Saamuda. The Burmese general disapproves of the union between Munaruna and Samudra, and revokes the privileges that the Tamil immigrants had until then. Violence breaks out and the Tamil nationals flee Burma. Munaruna and Samudra join the refugees on a ship with Saamuda and Mallika. When Samudra’s father comes looking for her, Mallika spitefully reveals where they are hiding. As Samudra and Munaruna try to escape by diving into the ocean, Munaruna is shot and killed. Samudra handcuffs herself to Munaruna and drowns with him after promising to be together forever.

Maaran (Sathyaraj) is a clerk in the district collector’s office. His life centres around his loving wife (Seetha), his son (Raghuvannan), and his daughter (Preethi Varma). Soft-spoken, and a Gandhian to the hilt, Maaran does not stand by any smear on the Mahatma’s name. Being a staunch patriot, he had even named his son Sudhandhiram.

Bomman loves his pet elephant, Manickam. When a neighbouring village is ravaged by a rogue elephant, Manickam’s services are requested, but the following days bring great tragedy into Bopanna’s life.

Son-in-law makes an attempt to change his mother-in-law’s character to make her to feel that his love is towards her daughter not on her property.

Faction feud in Tamil Nadu results in the death of Singaraayar’s (Nagineedu) brother and he, along with his two sons Dharma (Ravi Prakash) and Kaali (Sugunthan), vow for revenge. Time turns and comes to Chennai. Here lives Sakthi (N. Santhanam), an innocent and somewhat unlucky guy whose parents are no more and is ousted out of his job. His life takes a turn with a correspondence that he has got five acres of land in his hometown in Tamil nadu. He decides to sell that land and sets off to the village. In this process, he also meets Vaanathi (Ashna Zaveri) who is the daughter of Singaraayar. However, much to Sakthi’s bad luck, he happens to be the son of the man who killed Singaraayar’s brother and he ends up in their home itself. He takes advantage of a tradition of their house that not even one drop of blood should fall inside the house. Vaanathi falls for Sakthi in the mean time. He escapes in all the plans much to the fury of Singaraayar. Soon the story takes a twist when Vaanathi, not knowing that Shakthi is the son of the man who killed her father’s brother, falls for Shakthi. Her cousin Raja comes to know about this and refuses to marry Vaanathi, though Shakthi had convinced him earlier in order to prolong Singaraayar’s plan. Singaraayar had moved the engagement to the temple so Sakthi cannot prolong the plan to kill him any longer. When Raja tells Singaraayar about Vaanathi’s love, he slaps Raja. And in the engagement Dharma carries a basket he thinks Shakthi is hiding in, away from the temple to kill him. It is then revealed that Shakthi is still in Singaraayar’s mansion. Then he runs away from the house only to be chased by Singaraayar’s men.

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?

Ashwin Kumar (Jiiva) is a photojournalist working for the private newspaper Dina Anjal. He witnesses Naxalites robbing a local bank. He chases them and manages to click photos of the robbers. When he tries to escape, he is stopped by a young woman Renuka ‘Renu’ (Karthika Nair) who assumes he is the culprit and helps the robbers to take his camera. However, he is able to secure the memory card of the camera. The police catch him, and to prove that he is a press photographer, he shows the photos to them, who identify everyone except the gang leader (whose face is covered by a mask). At his office, he again meets Renuka, who has newly joined as Article Editor. Saraswathi ‘Saro’ (Piaa Bajpai) also works in his office and has feelings for Ashwin, who does not reciprocate.