An academically bright but faint-hearten rookie cop needs to man up and overcome his fears in order to succeed in his very first assignment-team up with a hostile and reclusive senior cop to catch a serial killer on the loose

Rudhran is a happy IT man living with his family until the moment his life is turned upside down. He comes upon a major criminal network including a businessman, Rudhran embarks on a mission to expose him the criminal network.

Thenindian intervenes three separate stories that take place in the heart of Kochi. The first incident revolves around the murder of Jaimy Padamadan, a local politician whose popularity was rising at an alarming rate due to the upcoming elections. The second tale tells the story of Anupama, an IT employee who is followed by a group of gangsters. The third story is about a group of five friends, one of which is Hari, who is supposed to deliver a package to another person, on the way to their road-trip. How do these three story interweave and come out as one forms the crux of the story.

Manimaran (Sarath Kumar), his father Poochi (S. V. Ramadas), and his grandfather Nagappan (M. N. Nambiar) are short-tempered persons who beat the villagers for a simple quarrel. Only, Manimaran’s mother, Sivagami (Lakshmi) can control them. Uma (Rajeswari), Manimaran’s sister, gets married to a man of another village. Manimaran falls in love with Vaidehi (Devayani), a Brahmin girl, and gets married to her without her permission. In a fight against Manimaran, the antagonist becomes blind in one eye and decides to take revenge on Manimaran. When Manimaran drives his pregnant sister, the antagonist stops him but Manimaran beats the antagonist and his henchmen. Uma comes too late at the hospital and dies with her baby. Vaidehi leaves their house because of her husband’s behaviour who brings Uma’s death. Manimaran changes his behaviour and tries to convince Vaidehi to come back home.

Vijay, a cop, is on a mission to apprehend Bhoopathy, a notorious criminal. He infiltrates the gang to become his right hand man. But, in the bargain, he ends up witnessing the killing of his mentor.

Chinnayya (Sarath Kumar) works for a rich man Ayya (Vijayakumar) in a village. Chinnayya has great respect and affection towards Ayya and Ayya, too, takes care of Chinnayya and looks after him as his own son. Ayya hates his first daughter Gowri (Sithara) and her husband (Mansoor Ali Khan). Prabhavathy (Simran), Ayya’s younger daughter, arrives at the village after completing her education from the US. Prabhavathy loves Chinnayya but he does not reciprocate, thinking this would be a betrayal of Ayya’s trust in him. Later, Chinnayya too understands Prabhavathy’s love and accepts it.

The film opens with Arasu (Sarath Kumar) murdering a person in Mumbai. Later the story shifts to Kumbakonam where he is an assistant to a temple priest (Delhi Ganesh). Soon the priest’s daughter Meera (Simran) falls in love with Arasu. At the stroke of interval Arasu sheds his mask and murders a rowdy who is out from jail and this shocks everybody. Then in a flashback he tells that his father (Sarath Kumar) believes in taking law into his hands and his wife Sivagami (Roja) will be support with him and so had lot of enemies. When he confronts a bad guy (Sai Kumar) and humiliates him, the villains later kills Arasu’s father along with his wife . The rest of the story is how Arasu takes revenge for killing his parents .

A set of circumstances makes Sakthi leave Mumbai for a village in Tamil Nadu. However, he ends up getting embroiled in a feud between the wealthy Karpagavalli and her deadly brother-in-law.

Mirasu (Senthilnathan) killed his elder brother Selvanayagam (Nizhalgal Ravi) and Selvanayagam’s wife (C. R. Saraswathi), he tried to kill his mistress Lakshmi (Kavitha) for the inheritance. The innocent Lakshmi was then sent in jail for Selvanayagam’s murder and gave birth in jail, with the help of a police officer, she escaped from jail with her son Vijay.
Many years later, Mirasu spreads terror among the villagers and rapes the village girls, his son follows his path. Poongodu (Sukanya) and her family try to flee the village but Mirasu’s henchmen intervene and Vijay (Sarath Kumar) saves them. Vijay, who comes from another village, introduces himself as an orphan. Poongodu falls in love with Vijay and he gets married to her. Finally, Vijay clashes with Mirasu. What transpires later forms the crux of the story.