Venu is a middle-class young man who lives in a middle-class area. His life revolves around his mother, sister, neighbor, and friends. He has an inferiority complex because of the scar on his face. On one fateful day, Venu decides to do a plastic surgery to remove the scar. In order to raise money for his operation, he takes up part-time jobs. He becomes harsh and cold and starts behaving strangely with his family and friends. This new Venu leaves everyone around him in a state of shock. The rest of the story is about what he realizes in the process of getting his new face job.

This film has the water scarcity that the city faces severely as its backdrop. It revolves around three interesting characters. ‘Baskar’, who takes up desalination of seawater as his ambition; His childhood friend ‘Archana’ who later turns out as his spouse; ‘Madan’, who makes pivot changes in others life with his sheer intelligence. What happens when these three meet up? How these characters use their brainpower variously is narrated sophisticatedly. How a young chap with such an ambition arising from a third world nation triumphs is told with an interesting screenplay.

Major Mahadevan (Mohanlal) is an officer deputed to the National Security Guards (NSG). He has been assigned to counter-terrorism duties in Kashmir and commands an elite group of NSG commandos. He calls back his buddy Havildar Jaikumar (Jiiva) from his honeymoon because he has information about major activities of the militants; he feels Jaikumar is needed for the team. The commandos raid a mosque in civilian dress and seize a big collection of arms and explosives. Later, during an operation focused on some cottages near the Dal Lake, a commando in the team is killed and an outraged Jaikumar shoots down a captured terrorist who challenges the commandos. A human rights activist (Shwetha Menon) learns about this and threatens to file a complaint with the government. She later understands the situation and the sincerity of the commandos and decides not to proceed with the complaint.

An isolated tribe, living far from the modern world, battles both natural and man-made threats as it struggles for survival.

Vivek (Bharath), Aravind (Arun), Eshwar (Arjun Bose) and Shafeek (Padma Kumar) are four angry engineering students who cannot stand the corruption in society. They take the law into their own hands and they form the secretive clique called 4 The People (their dress code is black and everything about them is black) that takes out corrupt officials. They have a website where the public can lodge their complaints. Soon the police are on their track. A young cop (Narain) is in hot pursuit of the gang. In a racy climax the foursome attempt to kill the Minister but fail. Seeing the brutality of the police the students come to the support of the foursome. One of the students kills the minister and is joined by three more students. They escape due to the support of students. The revolution continues.

Jaya (Simbu) is an orphan and a born rowdy working in a hotel as a helper. He gets his title name “Thotti Jaya” as he is born in a garbage bin. People who confront him dread even his shear presence. Seena Thana (Pradeep Rawat), a local rowdy notices Jaya’s qualities as a rowdy, makes him his right hand henchman and uses him in his anti social activities. In an incident, Jaya gets entangled in a political and police trap. To escape from police, Jaya slips to Calcutta and goes into hiding. Meanwhile Brinda (Gopika), a college lace from Kanyakumari comes to Calcutta on a tour along with her friends. Pimps operating in the red light area of Calcutta take away Brinda and force her into brothel business. Jaya accidentally meets Brinda who is held captive by the gang. He helps Brinda escape from the gang and takes her safely to Kanyakumari. On her way back home by train, Brinda starts admiring Jaya’s niceties and gradually falls in love with him. When she expresses her desire, Jaya reciprocates her love, and both decide to enter into wedlock but little does he know that Brindha is actually the daughter of Seena Thana. Jaya takes away Brinda from her house and in turn, earns the wrath of Seena Thana. Angst at this, Seena Thana summons his rowdy gangs and plots to bump off Thotti Jaya. How Thottijaya accomplishes his hopes of marrying Brinda is told eloquently in the remaining part of the story.

The romantic story begins with Senthil (Cheran) setting off on a journey, to invite his friends and family for his forthcoming wedding. Along the way, he encounters various individuals from his past, who bring back memories of three women that have influenced his love life.
The movie begins with Senthil, who runs an advertising agency, boarding a train to visit his native village to invite all his friends for his wedding. During the journey he reminisces his teenage days. The happenings in the school, his tussle with his friends and his first love with his classmate, Kamala (Mallika), are all pictured with fun and drama. However he father married her off early before her 11th grade. He meets Kamala after 15 years and she is now a pregnant mother of 3 born children. Senthil reaches the village and invites all including Kamala, who promises to come to the wedding.

The story revolves around an ego clash between father and son. Puli (Sundar C) is a local rowdy and the son of a math teacher Vedhukannu (Prakash Raj). Vedhukannu hates his son for being a rowdy and not being proficient in math. As part of a flashback, it is shown that young Puli was very good in physics, but his father, being a math teacher, wanted him to excel in math, which he was unable to do. As a result of repeated physical and mental abuse, Puli takes the wrong route to grow up. In the meantime, rival gangs and police try to kill him, but he is accidentally saved by his half-sister, a daughter from an affair his father had. Puli helps his half-sister in return for her unexpected help and vouches for her safety. The rival gangs kill her and put the blame on his father. How Puli brings the truth to light and unites with his family completes the rest of the movie.

Thirumalai (Nasser) owns a provision store in a village and lives with his family comprising his wife (Saranya Ponvannan), brother-in-law Karupatti Ayyakannu (Vadivelu), son Krishnan (Bharath) and a daughter. Thirumalai is very strict, short tempered and is referred as “Emden” by his relatives. Krishnan studies poultry science in a college and also assists his father in managing the store. Krishnan worries about his father’s rude behaviour towards him.
Divya (Gajala) is Krishnan’s classmate and she is also the daughter of the auditor who manages Thirumalai’s accounts. Divya proposes to Krishnan, who does not reciprocate as he loves his maternal uncle’s (Shanmugarajan) daughter, Janani (Gopika). But enmity prevails between Thirumalai and his in laws’ family. Krishnan lives with the hope that the two families will unite someday paving the way for his wedding.

When Saravanan goes to Hyderabad, Kanniah plagiarizes his script and pitches it to a producer, under the condition that he has to play the hero in the film. Impressed by the script, the producer agrees to the condition. The movie turns Kanniah, now rechristened Dilipkanth, into a star. Saravanan does not give up and creates another story. However, he finds out he cannot make his film unless Dilipkanth plays the hero. Because of this, they lead into minor problems, which annoy Saravanan and their team. The shooting starts with Dilipkanth as the hero but is halted midway, owing to various tantrums thrown by the new opportunistic hero. Determined to finish the movie, Saravanan seeks the help of his crew and friends in the cinema industry. Unknown to Dilipkanth, Saravanan and his crew manipulate him into situations that match the storyline of the movie they are shooting for, and capture Dilipkanth’s live reactions. They manage to fool Dilipkanth and finish shooting the climax of the film even as the self claimed new star makes a fool of himself. A few days later, he is invited to watch the premiere of the movie and is shocked to see the recent events of his life unfold on the silver screen. He soon realizes the effort put in by Saravanan and crew and feels humbled. He genuinely acknowledges the talent of the director and leaves the place, apologizing to Saravanan for his pathetic behavior and agreeing that Saravanan is better than him in a very mannered way.