Siddharth lives a middle-classed lifestyle in India along with his dad, retired Justice Shravan Mathur, mom, Laxmi, and sister, Shweta. His dad has been assigned the task to investigate the collapse of a school-building which killed 20 children. The building contractor attempts to bribe Shravan to no avail. When he molests Shweta, Siddharth beats him up, gets arrested, is tried in Court, and sentenced to jail. In jail he is told that his father and mother have been killed by thieves abroad a train headed to Mumbai, and Shweta is missing. After his discharge he attempts in vain to locate Shweta. He takes up employment with a five star hotel, romances the owner’s daughter, and decides to kill defense lawyers. He successfully kills advocates Brahmanandan, Jankiram, and scares off Karuna Sagar who was ready to represent a male who had sexually molested a woman named Gayetri. While the accused has no one to represent him in Court, a Delhi-based Supreme Court lawyer, Ashok Mehta, agrees to represent him despite of threats from Siddharth, who is determined to kill him at any cost little knowing that his past will not only re-visit him, but a witness, Major Vishwanath, will come forward, ready to identify him as the killer of Advocate Jankiram.

The film revolves around two college friends where one is a new student. The new student falls in love with his friend’s sister without knowing she is his friend’s sister. The plot forms when he realize the truth.

Ezhumalai (Arjun) leads a peaceful life as a dance master in the village. Anjali (Gajala) falls in love with him before learning he has a son and his wife Lakshmi (Simran) is dead. She wishes to marry him but faces competition from Lakshmi’s sister Sandhya (Mumtaj), who also wishes to wed him. Anjali is the daughter of Nagalingam (Ashish Vidyarthi), who is from a neighboring village. When she reveals this fact to Ezhumalai, she learns he and her father are sworn enemies, and her father killed Lakshmi.

The story focuses on the life of Sabhapathy (Nakul). He is the football-crazy son of an alcoholic and lives in the slums. However, he lives a comfortable life and plays football with his mates as he completes his college career. He meets Meera (Sunaina) and develops a liking for her. He slowly starts to love her but is afraid to express his love since she is rich and would react hastily. However, he later does confirm his love to her, and she accepts. When Sabha leaves for a football match with his college, he promises he will propose to her as soon as he gets back. Sabha returns from his match to only find out that Meera has died. He slips into a psychotic depression, travelling with Meera’s dead body. To make matters even worse, the police are after him. The film ends as he commits suicide after killing Meera’s uncle Kasirajan (Hariraj), who murdered her in order to gain her wealth.

Ramanaa begins with the abduction of fifteen District collectors. After three days in captivity, fourteen officers are released, but one is murdered. The police find a tape recording and a file on the dead officer’s body that provide significant evidence concerning the kidnapping and subsequent murder. The file suggests that the crimes were committed by members of the self-proclaimed “Anti-Corruption Force” (A.C.F.), a citizen militia seeking to eliminate corruption through vigilante acts. The militia, acting as a kangaroo court, “sentenced” corrupt officials in the area to death, beginning with the captured revenue officers who were apparently engaging in criminal activity.

A man who is separated from his family as a child is replaced by an interloper.

The film starts with Kailasam (Ravi Kale), the somber bigwig who is performing the last rites of someone dear to him, but the appearance of Kottai (Jiiva) (first in the chaotic Koovagam festival and later atop a Veeranam pipe) swinging a scythe maniacally sets the tone for the rest of the film.
Cut to the flashback a few months ago: In Ramnad, Kottai’s mother (Saranya Ponvannan) is cutting down logs and boasting about her son: he is a god who deserves to see the outside world and derive its benefits. Kottai journeys to big bad Chennai in company with Vellaiyan (Ganja Karuppu), who dances with every Karagattam dancer on the roadside, makes lewd jokes, and appears to have only one thing on his mind. They end up at the massive home of Kailasam, the local terror who slices up people whenever he can. However, our heroes are unaware of the fact.

Thenmozhi (Anushka Shetty) arrives in Boston to meet her niece. While leaving for Chennai, in the airport, she gets a free upgrade and sits next to Sathyadev (Ajith Kumar). During the flight, she starts vomiting due to overeating and with Sathyadev’s help she feels better, so she develops a crush on him. The next day in Chennai, Sathyadev and Thenmozhi are at a cafe, when a criminal named Victor (Arun Vijay) comes to abduct Thenmozhi, but fails due to Sathyadev subduing him.

The film goes back to Chennai 1989 (then known as Madras) where Sathyadev’s father (Nassar) is killed by a criminal. From there, Sathyadev makes a decision and a few years later is seen in a jail with Victor. They escape from jail, get Victor married to Elizabeth alias Lisa (Parvathy Nair), and meet a criminal Matthew (Stunt Silva). Sathyadev infiltrates the gang as an IPS officer, kills Matthew, and injures Victor. In an attempt to stop a gangster, he meets Hemanika (Trisha Krishnan), who needs to get to a hospital due to her being pregnant. Two years later, he meets Hemanika and her child Isha (Baby Anikha). After seeing each other for four years, they decide to get married. On the day of their marriage, Hemanika is killed: Sathyadev and Isha are heartbroken. Sathyadev decides to quit and travels with Isha around India along with his colleague Richard’s (Vivek) help. After he returns, his neighbour’s children have gone missing. He discovers that Victor is helping his boss Muruganandham (Suman), stealing organs illegally with foreign doctors to help him. Sathyadev is able to find the children and their next target, Thenmozhi.

A maverick cop is forced to work outside the limits of law, when the system fails.The story weaves across the past and present while revealing the motives that shape his actions.

Two sons of a labour leader, who is framed by his employers, grow up amidst great difficulties. The elder son turns into a don while the younger, protected by his brother and mother, becomes a cop.

After finishing a successful meeting with his movie producers in Bangalore, Nanda, a jingles composer catches the highway to Chennai. On his way his car breaks down and he hitchhikes with Arjun, a businessman’s son on his way to the same destination. During their journey together they discuss their personal lives till Arjun proposes a deal; a deal that is marked with murder but promises to better their personal lives. However this deal does not work in Nanda’s favor and he soon finds himself in deeper complications.

Nirupama, an ambitious woman studying in the USA, marries a dance master, Viswanathan. On being suspicious of his behaviour, she hires a detective, who reveals his true identity and past.