The film begins with the young man Sakthivel (Ranjith) coming back to his village. At his return, he is respected and treated as God by the villagers, they call him Thirukkaval. Thirukkaval still hates his father Chettiar (Jaishankar), stepmother Azhamu (Kavitha), stepbrother and stepsister. The kind-hearted Thirukkaval quickly makes enemies including Munnumunuthan (Vasu Vikram), Kodumudi (Kazan Khan) and his father Chettiar. Meanwhile, Pasupathy (Ravi Shankar) and Chinna Pulla (Rajakumari) fall in love with each other. The affair is soon exposed, so Thirukkaval arranges their wedding. Shortly after, Pasupathy dies in an accident and the villagers blame the innocent Thirukkaval.
In the past, Thirukkaval lived happily with his father Chettiar, his mother Shenbaga Valli and his baby sister Chittu. Chettiar had an affair with Shenbaga Valli’s sister Azhamu and Azhamu became pregnant. Unable to bear the situation, Shenbaga Valli killed her baby daughter and committed suicide. The angry Thirukkaval injured his father’s foot and run away. He then became a child labourer to make a living.
Chinna Pulla’s mother Appayi (Manorama) passes away. Thereafter, Thirukkaval is accused of having an affair with the widow Chinna Pulla. What transpires next forms the rest of the story.

The film begins at a journey in train where Paari (Jiiva) looks back at everything. Cut to the beginning, one remote village in Ramanathapuram. Paari is a do-gooder helping everyone in need. A magnanimous man, he gives anything and everything to others if they ask for. Promising his father Vasu (Azhagam Perumal) to earn more, Paari sets out to Chennai but faces more challenges. He meets a young girl Madhi (Poonam Bajwa) and falls in love with her. Some goons also cause trouble for Paari. Meanwhile, Sivamani (J. D. Chakravarthy), the dreaded but sophisticated don of the city, is getting ready to marry Madhi. When the two stories meet, chaos ensue. It is up to Paari and Sivamani to sort it out.

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