The story revolves around a mother-son relationship set in Kodaikanal. The movie commences with Rama Krishna (Jiiva) and his mother Saradha (Saranya Ponvannan), a school teacher, lying in a pool of blood. The police finds that Raam is still alive and arrests him on charges of murdering his mother. Police Inspector Umar (Rahman) works on the case. The story is narrated in a flashback. Raam is a mentally affected teenager (later diagnosed as autistic) living dependent on his mother. His overcompulsive adoration for her lands her in various problems. Raam is provoked easily and tolerates little wrongdoing around him. Next door lives Karthikayeni (Gajala), the daughter of a Sub-Inspector Malaichamy (Murali). She falls for Raam, but upon telling him how she feels, gets a blunt response from him. One day, Saradha is found brutally murdered. Umar grills each and every person connected to her and Raam. Every possible motive Raam might have for murdering his mother is explored. Raam’s neighbors, Malaichamy, and his children are summoned by Umar for interrogation. The police eventually find out that it was Karthika’s brother Satish (Kunal Shah) who committed the murder, fearing Saradha would tell his parents about his drug addiction. When Umar confronts Satish and forces him to surrender, Satish fatally wounds him and escapes, injuring his father in the process. On finding her brother’s hideout, Karthika tries to plead with him to surrender, but he refuses to do so and ties her up. Raam, seeking vengeance, finds the hideout. A brutal fight occurs between the two, and Raam kills Satish. The film ends as the police find the hideout while Raam is meditating on a dilapidated roof.

The story is set in a rural area around Madurai, in the village called Paruthiyur, which still practices caste segregation as a result of the controversial Criminal Tribes Act imposed by the British colonists, where members of impoverished communities are stereotyped as generational criminals.
Paruthiveeran (Karthi) is a country brash whose inter-caste parents were ostracized by the villagers since his higher caste father married his lower caste mother. After his parents’ death, Paruthiveeran was mostly raised by his doting paternal uncle Chevvaazhai (Saravanan) who pampers and accompanies him in every misbehavior to keep him happy. Having grown up among his mother’s people, he is often arrested for petty crimes. His one ambition in life is to gain enough notoriety to be on TV news and to be thrown into Madras Jail. He often bullies Paruthiyur villagers for money and fun.

A Misogynist’s attitude towards women and love starts to change after he develops feelings for a woman.

The film begins in a city in Andhra, where the CBI raid a rich local politician’s house. The Chief Officer is shown to be Aadhi (Jayam Ravi), who orders to seize all illegal items found. The politician is arrested, but he requests to come to the CBI office in his own car. It is later revealed that no CBI raid was planned on his house and all that happened was a hoax. The politician gets angry and orders to hunt down the men who cheated him in the name of CBI.