The voice of director Sasikumar to introduce the four mischievous guys Pandi, Mangaa, Kona, Maari, in his typical Madurai lingo who think they rule the ‘Kadavur’ village.
These four friends are united, very close and live for each other. They always think out-of-the box. They turn out to be vagabonds and go to the extent of even killing the village President’s son. After few similar delinquent experiences they are forced to leave the village and end up coming to Chennai.

This story is all about an ambitious boy named Seenu alias Srinivasa Rao (Ravi Teja) who dreams of becoming a don. He always likes to be called as ‘Don’ Seenu since childhood due to the strong influence of the Amitabh Bachchan starrer ‘Don’. He grows up with just one passion – that of becoming the World’s No: 1 Don. Thanks to his enterprising nature, he gains access to the cream of the city’s dons, and uses his cleverness to play off the top two – Madhapur Machiraju (Sayaji Shinde) and Narsingh (Srihari), fierce rivals – against each other. Seenu wants to join one of these dons and grow up in the ranks. He joins hands with Machiraju. In the process he is given a task to go to Germany and win the heart of Narsing’s sister whose marriage is fixed with the son of the super don Naveen Duggal (Mahesh Manjrekar). Seenu goes to Germany and wins the heart of Deepthi (Shriya Saran) and later, he discovers that he was shown the wrong girl. The wrong girl is none another than the sister of Machiraju. Then when Machiraju discovers that his henchman is the one who showed the wrong girl, Machiraju attempts to kill his henchman. This leads to various turns in the plot. What happens next is all about how Seenu achieves his dream of becoming a don and live happily with Deepthi or does he?

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.

Ashok’s (Prakash Raj) brothers smuggle drugs and are unstoppable. Only Alexander (Vijayakanth), a CBI officer, can arrest them.

Bhavani (Sneha), an honest police officer in Hyderabad, is posted as Assistant Commissioner of Police in Tirunelveli upon the request of the Tamil Nadu government. The town is controlled by Sivalingam (Kota Srinivasa Rao), a baddie and aspiring politician who indulges in all unlawful activities. Bhavani resolves to put an end to all his acts. Meanwhile, Surya (Sampath Raj) voices against Sivalingam. As it happens, Sivalingam’s son Ranjith (Aryan) plays spoilsport in the life of Bhavani’s sister Deepa (Yasmin Khan). Efforts to prove him guilty by Bhavani end in vain. Now, a conspiracy is hatched by Bhavani in the company of Surya, and Ranjith is killed. An enraged Sivalingam takes Bhavani head-on. Sivalingam vows vengeance, and what happens from there forms the rest of the story.

Rajan Zachariah, an Inspector of Police working in the Palakkad District on the Kerala-Karnataka border, investigates a murder case that is very important to him.

Kumar and Mahesh’s friendship is faced with a series of incidents that bring light to larger social and moral issues.

Jaihind tells the story of the journey of five people, linked by one man, who fights for childrens’ rights to education. Parvathi (Yuvina Parthavi), from a very poor family background, gets an admission into one of the most affluent schools in the city. However, the man of the house is forced to sell one of his kidneys in order to pay the exorbitant school fees. They still are unable to raise nearly enough money for the school, and they finally give up and commit suicide. This disturbs Abhimanyu (Arjun Sarja) deeply, and the computer service engineer becomes a hero overnight, by propagandizing a solution for education costing so much. Abhimanyu suggests that all private schools be nationalised, which will compel them to offer services at very little fees compared to that being collected now, while still ensuring that the quality of education is not compromised. This is bad news for the private school owners, who make a business out of educating children. Abhimanyu is targeted and pushed to extremes for his ideas. He is put behind bars and has people conspiring to murder him. How he succeeds in his mission, despite all this, forms the crux of the movie.

Vasudevan aka Vasu (Vishal) is a Coimbatore-based moneylender and also the heir to the Kovai Group, a cloth manufacturing conglomerate, until he was disowned by his mother and matriarch of his joint family Rajalakshmi (Raadhika) due to some misunderstanding. He meets a rich girl Divya (Shruthi Haasan) at a mall, who soon falls in love with him for his good nature. One day, Vasu saves the Additional Superintendent of Police for Coimbatore District Sivakkozhundhu (Sathyaraj) and his wife (Aishwarya) from a group of thugs who work for Anna Thandavam (Mukesh Tiwari), a Pollachi-based businessman and contract killer who kills anyone to acquire their land and money. As Sivakkozhundhu was transferred to Coimbatore district to capture Anna Thandavam, the latter had planned to kill him. Anna Thandavam also plans to illegally grab land sold to a village temple by Vasu’s late father. These two incidents cause enmity between Vasu and Anna Thandavam.

As the state’s police start eliminating the criminal gang of Daniel, a notorious terrorist, there arises a challenger, Thalaivan, who seems to be a bigger threat to the police department.

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.

Amudhavel (Vishal), after spending 6 years in the United States, returns to Cuddalore for his marriage to his long-time girlfriend Meenu Kutty (Catherine Tresa). He is forced to invite to his marriage a local don Thamba (Madhusudhan Rao), despite a previous history between them. Thamba was responsible for dragging Amudhavel and his elder brother Gnanavel (Mime Gopi) to jail 5 years ago on a false charge after Gnanavel, who worked in Thamba’s fishing business, decided to leave Thamba and start his own fishing business. Thamba was also responsible for chopping off the leg of Amudhavel and Gnanavel’s father Rajarathinam when he had tried to intervene in the fight between Thamba and his sons, confining him to a wheelchair. To escape from Thamba and his gang and not cause any more harm to his family, Amudhavel had emigrated to the US.