Karthik and his friends plan a trip to Kodaikanal where they meet a doctor and his 12-year-old daughter Shalini. While sight-seeing, they get in trouble with a gang that grows cannabis illegally. The next morning, Karthik is found dead and Shalini is missing.

The film opens with the discovery of a corpse of a teenage girl who was brutally murdered.
Arun Kumar (Vishnu Vishal) is an aspiring filmmaker who wants to make a movie on psychopaths. After being rejected many times and due to pressure from his family, he decides to give up his dreams and become a sub-inspector with the help of his brother-in-law Doss (Ramdoss), a police officer himself. He moves to Chennai to stay with his sister Kokila (Vinodhini Vaidyanathan), Doss, and their daughter Ammu (Abhirami). Ammu gets into trouble when she makes Arun sign like her father in her report card. Her class teacher figures this out and thinks she signed it herself. He meets and befriends Ammu’s teacher Viji (Amala Paul) and her niece Kayal (Baby Monica).

The film begins with a suicide bombing attack in Germany at a peace conference where Indian Home Minister (Sachin Khedekar) is affected by an unknown virus. In RAW headquarters, menon (Sarita Choudhury) joins the investigation. RAW HQ is threatened by a threat who calls himself Doctor. In HQ, army officer Aazaan Khan (Sachiin J Joshi) is interrogated about the case because of his brother’s, Aman Khan, involvement as a terrorist in the suicide bombings.
Aazaan is deployed in Waziristan to infiltrate the enemy force and to find the whereabouts of his brother. He travels from country to country to find the culprits and even becomes one of them to gain their confidence. Aazaan comes across two Pakistanis from whom he soon finds the whereabouts of the kingpin, the Doctor. The Doctor has taken hold of Mahfouz (Dalip Tahil) and has seized the cure for the virus from him, so now he has both the weapon and its antidote. He knows that Aazaan is with the cops, and both are led to be killed in the market square. Aazaan breaks free and tries to rescue the scientist, but it’s too late. Before being detonated by a strapped bomb, he tells Aazaan to find a sand artist in Morocco and a girl with her, as they have the cure for the virus.

Crazy, unemployed, and out of control collegian, Subramaniam, is the son of Chennai Municipal truck driver, Mani, who lives a poor lifestyle with his wife and daughter, Lakshmi. Things spiral out of control for them after Subramaniam gets in the wrong books of MLA Suri – who wants them dead at any and all costs.

Ajay Raj, Ganesh and brothers Jagapathi Babu and Ram Babu are close friends who spend a lot of time together in Chennai. Ajay is a television actor, Ganesh is a fun-loving engineering student who falls in love with every woman he sees, Jagapathi Babu is an engineer who is married and has a six-year-old daughter, and Ram Babu is Jagapathi’s younger brother who lives with him.
Ram is in love with Pooja, but before he has a chance to tell her, Pooja tells Ram that she is in love with Ajay. Pooja and Ajay eventually get engaged, leaving Ram heartbroken. He soon forgets his grief and has a good time with Ajay, Ganesh, and Jagapathi.

Suriya, a sub inspector happens to investigate a theft case that takes place in an architect Siva’s house. Right from the moment Suriya sees Siva’s wife Ramya. Now how Suriya takes revenge against Ramya and does he succeed in it?

A successful architect is approached on his trip to the Paris Airport by a chatty girl. Although the meeting seems fortuitous, soon there be a turn that will transform the encounter into something much more sinister and criminal.

Sathya (Sibi Sathyaraj), who is working in Sydney, gets a voice call from his ex-lover Shweta (Remya Nambeesan). They worked in the same office and wanted to get married, but her father arranged an alliance with an entrepreneur named Gowtham (Siddhartha Shankar). Sathya leaves for India with the pretence of attending a marriage in their relatives’ household. He takes a car for hire from Babu Khan (Sathish), a travel agent. Sathya also takes a SIM card on his sister’s address and stays at Hotel Marriott.
Sathya meets Shweta at a restaurant and learns her five-year-old daughter Ria (Baby Sherin) is missing. Things went worse when none except Shweta believes that Riya exists. He also learns about Gowtham’s brother Bobby (Ravi Varma), a drug addict who regularly visits her home. Sathya begins an informal investigation which fails many times, but Babu saves him. Posing as Vasanth Menon, a police officer, Sathya meets Gowtham and learns the couple was childless. Gowtham recalls Shweta being attacked by two masked men to steal her car. He added that Shweta went into a coma and post recovery started telling that she had a five-year-old daughter named Ria.

An honest policeman reluctantly arrests his brother who has been accused of murdering his lover. Soon after realising that he is innocent, the officer sets out to serve justice to his brother.

The film begins with a narration on how India has been turned into a landfill site for domestic and foreign countries, with the countries dumping even ammunition waste onto Indian soil. In Delhi, Balusamy, aka Balu (Arya), a communist leader, is convicted by the court on counts of robbery, murder and treason is given death sentence. Despite Balu’s request to execute him as a martyr by shooting, the court orders that he be hanged within a month’s time by a professional executioner or hangman. He is escorted to a high security prison complex in Chennai by Macaulay (Shaam), an honest, law abiding police officer who is given the charge of monitoring him until his execution. The prison provides freedom to all prisoners, including Balu, to do whatever they want, as long as they do not cause unrest. Balu is instantly admired by the inmates for his patriotism and philosophy as well as his empathy with the inmates. They view him as a spokesperson to the prison officials on behalf of them.

The Story revolves around the criminal who surrenders himself stating that he has committed a murder of a girl who loved him, then the story revolves around seven people who are involved in this mysterious case. Three timelines of the story will convey the protagonist’s character who is not guilty in the eyes of justice.

Krishna (Jayam Ravi) is a happy-go-lucky youth who excels in every field but always does strange and dangerous things to obtain a certain “kick” – a thrill or excitement that he craves. One such activity is secretly double-crossing his childhood friend Dass (Sathyan) while helping him elope. At this point, he meets Nisha (Tamannaah), who is shocked at his recklessness and writes him off as crazy. Krishna sets his sights on Nisha and woos her in a very unorthodox way; he begs her not to fall in love with him. After a host of comical situations involving Krishna’s caring but easygoing parents (Prabhu and Suhasini), local thugs (John Vijay and Mayilsamy), and an ever-present comic relief Jackson (Vadivelu), Nisha accepts Krishna’s love. However, she sets a condition: Krishna must stay in a well-paying job (he had resigned from other jobs due to lack of “kick”), and only then will she agree to marry him. Krishna accepts but soon resigns again for the same reason and tries to hide it from Nisha. When Nisha finds out, she breaks up with him and leaves him for good.