When giri marry’s her sister to a man in chennai and comes to visit the city his friend his brutally murdered by gangsters. He decides to murder the three gangsters ruling chennai to make the city a better place.
During the journey, he meets Saroja (Keerthy Suresh) and falls in love with her in the first sight. She is the make-up artist of the actress Srisha, and she wants to become a successful singer. Poochi tells about Saroja to Vairam who promises to help him woo her. Poochi then devises a plan, and makes her talk on the phone to a great poet Vairamuthu, who is actually Vairam. However, he soon realises that Saroja is not good at singing from any angle though continuing to support her. Saroja remains close to Poochi as she wants to enter the singing industry without knowing the true fact.
The film is about relationships between two families where hardships and affections are on the competencies.
It centers on five brothers: Elder one As the film moves ahead it unravels about enmity with other family where Devasena (Simran) is a pampered daughter. But Gunasekaran is kind enough in breaking the hardships and getting united by arranging nuptials for Devasena with his brother Karunakaran. However, Devasena mistakes Prabhakaran to be her bridegroom. When things are unraveled and Prabhakaran turns away from Devasena’s offer of marrying him, she vows to alienate him from his family by marrying Karunakaran.
Rest of the film is about the hand-in-hand combat between Prabhakaran and Devasena with each one moving around with their smart plans.
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.
Kaali (Karthi) is an impulsive and short-tempered working class man who works in an IT company and enjoys playing football during his free time. His best friend is Anbu (Kalaiyarasan), who is a young political aspirant. They along with their gang live in the dilapidated flats of the housing board in Vyasarpadi, North Chennai. In a long-standing bloody feud, two factions of a political party have been laying claim to a wall on which they can paint the portraits of their respective political leaders. Anbu, under the local leader of one of the opposing parties, Maari (Charles Vinoth), is determined to claim that wall for their own party. The other party chief is Kannan (Poster Nandakumar) and his son Perumal (Mime Gopi) who are hell bent in making sure that their opponents efforts go in vain. The painting of Kannan’s father’s face has been on the wall for two decades, since the start of the feud. The two parties and their supporters get into frequent clashes and scrapes. In the meantime, Kaali falls in love with Kalaiarasi (Catherine Tresa), and she too reciprocates his feelings.
The story opens in Karaikudi, where Gouravam (Santhanam) is a well-known traditional cook making a living undertaking orders for marriage functions. He is forced into taking an order for a local goon’s wedding and is not happy about it. Saravanan (Vishal) and his four friends, who come to work for him as junior cooks, offer to help him but land him in even greater trouble and they are forced to flee from Karaikudi. The story shifts to Trichy, where Saravanan and his friends have grand plans of opening a restaurant with the help of Gouravam and his money. Here, just like in Malaikottai, it is love at first sight for Saravanan when he sees Aishwarya (Aishwarya Arjun). Things go wrong and as their love deepens we are introduced to two rival gangs, Kasi and Manaa along with a ‘Madurai Anachi’ who are constantly at each other’s throat. In a conflict Manaa forces Aishwarya to marry him and in the process of saving his love Saravanan reveals his past. Saravanan is a jail return who had killed 3 people in Madurai including Anachi’s only son to avenge the murder of an orphan kid whom Saravanan considers as his little sister. The rest of the story is how Saravanan protects his love and kill the dark forces.
A 14-year-old forlorn Kalyani delivers a boy in seclusion, fearing societal backlash and incapacity. She abandons him, heavy-hearted, placing him inside a moving goods train, which a slum dweller finds. The slum procures him as their common child, naming him Surya and they collectively raise him honest. He grows up, intolerant of injustice especially to the poor, though he wonders why his biological mother had impetuously abandoned him. A yellow shawl was the only identity he had of his mother, which she had placed him in when casting him away.
Devaraj, a powerful don who is kind yet feared by most in the society, also fights injustice, but by violent means. Ramana, an auxiliary of Devaraj’s, whose abusive demeanour led Surya to attack him, succumbs to his death. Surya gets apprehended for this. An exasperated Devaraj soon perceives Ramana’s felony, realises Surya’s cause was genuine and bails him out. Thus, Surya and Devaraj get to understand each other as both share similar social ideologies despite getting off on the wrong foot. Devaraj declares Surya his “Thalapathi”, a best friend.