Jens and Mike, two police officers on routine patrol, find themselves trapped in a maze of buildings when unrest spreads.

Siva (R. Madhavan) is based out of Srirangam and he comes to Chennai to join a college. He stays with his sister (Anu Hasan) and her husband (Raghuvaran). Siva does not like his brother-in-law and never talks to him, despite several attempts made by his sister to convince both.
Siva meets Priya (Meera Jasmine) during a bus journey, and it is love at first sight for him. He again meets her on a few more occasions and proposes his love, but she warns him to stop following her despite liking him. Siva understands that Priya’s brother Bhaskar (Atul Kulkarni) is a local goon, and he attacks anyone who follows his sister.

The story is centered in a village where the parents of first cousins Sujatha (Sadha) and Raghu (Gopichand) decide that they will be married to each other when they become adults. As a child, Sujatha’s uncle gives her anklets, which she wears as she grows up. As they grow older, Raghu is caught smuggling money from his house. At school, Raghu beats up a kid for talking to Sujatha. They quarrel, and Raghu’s family leaves for another village. Sujatha grows to be an attractive college student, while Raghu becomes a good-for-nothing character. On her way to college, Sujatha meets Ravi (Jayam Ravi), a poor, charming, and enthusiastic young man. He asks her to wear her anklets to college again, and soon after their quarrels, they fall in love. Meanwhile, Raghu’s parents (Nizhalgal Ravi and Nalini), hoping that he will become a responsible person after marriage, decide to carry out his marriage with Sujatha. The story takes a turn when Sujatha’s parents (Rajeev and Pragathi) learn about her love affair with Ravi. On the day of her marriage, Sujatha elopes with Ravi, and the action heats up as they are chased by Raghu and his thugs. Finally, Raghu is defeated in a face-to-face combat with Ravi, and Ravi marries Sujatha.

In Ooty, Krishnamoorthy alias Kicha (Arjun) and Mani (Goundamani) perform a swashbuckling heist of money of several crores while being in disguise diverting the attention of police, and escape in Nilgiri Mountain Railway, much to the frustration of a chasing police officer Ratnam (Ajay Rathnam). Kicha is a respected citizen who runs a home-based pappadam business along with Mani in Chennai. Susheela (Madhoo), one of Kicha’s many female employees, has a crush on him and is constantly demanding his attention. Another thing adding to her woes is the arrival of her jovial cousin Sugandhi (Subhashri). She makes the place so lively and playful with silly fights between Mani and Babloo (Senthil). Sugandhi later develops a crush on Kicha, especially after being saved by him from some molesting goons. Kicha reveals to her that he has no such feelings for her and wants her to find a suitable mate. Before leaving Chennai, Sugandhi steals Kicha’s ring as a souvenir.

A happy-go-lucky guy lands in trouble after he locks horns with an egoistic lady. Both of them try to outsmart each other during various situations.

A group of four youngsters get on a train, they are then scolded by a quick-tempered stranger Ananthakrishnan (Prakash Raj), he tells them that today’s young people are immature and good-for-nothing. The friends are about to prove him wrong.

Kabaleeswaran, a revolutionary who fights for the betterment of his race in a foreign land, is falsely implicated and thrown behind bars. When he returns after his prison term, he starts a search for his wife and ends up confronting those who were the reason behind his miseries. What follows is a tale of revenge, emotion, drama, jealousy, treason, loyalty, love and payback.

The film opens two years after the events of the first film, with Anitha Constructions Civil Engineer, Raghuvaran (Dhanush) winning the Civil Engineer of the Year 2016 Award and is an executive member of his company now, along with a parking spot. His wife, Dr. Shalini (Amala Paul) becomes an authoritative, nagging wife, who controls him. She has resigned her job to take care of the household, after marriage. Raghuvaran is also dismissive about his wife getting another job. Raghuvaran efficiently completes construction projects assigned to him, with the help of about 200 unemployed young Civil, Mechanical and Electrical engineers, who are his friends. Vasundhara (Kajol), a chairman of a big construction company in South India, Vasundhara Constructions, witness the announcement of Raghuvaran’s victory at the Engineer of the Year 2016 Awards and finds out about him. She makes Raghuvaran a job offer, but he humbly refuses, having been interested in creating his own construction company, VIP Constructions.

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.

Sivaji Rao, a Hyderabad based officer is posted in Mumbai to handle a corrupted cop called Pansari. He successfully manages to arrest Pansari but he soon makes bail and makes it his mission to make Sivaji pay for sending him to jail.

Commando Karanveer Singh Dogra, is skilled in many aspects of survival, weaponry, and hand-to-hand combat. He is on a mission to eradicate black money, which has been siphoned to banks along with his gang.He goes to Vicky Chaddha’s house where during night time, his wife Maria reveals that they didn’t have a life like this in the past. The film flashes to a flashback where his husband was forced to do all this because when he declined to do a negative job, the very next day, a bomb blast occurred where Vicky was saved but their daughter Tara died. Very soon, Maria kills her husband and says that she is the real Vicky Chaddha. Karan and his gang follow Vicky Chaddha and finally find her transferring money to an account. Karan beats up all the army in her team but doesn’t stop the money transfer. It is then revealed that he changed the account in which the money was scheduled to the transferred and the replaced account which will help the poor people. He said this was planned on the very first day. When Vicky says that police cannot arrest her, Bhavna Reddy shoots Vicky and they get out of there. While Karan and Bhavna will be together, a phone call arrives where Karan says he is waiting for a new mystery to arrive.

Shang-Chi, the master of weaponry-based Kung Fu, is forced to confront his past after being drawn into the Ten Rings organization.