| Director | K. Bhagyaraj |
|---|
Muthu is a well-off owner of a traditional oil extraction mill who lives in a village with his younger sister, Maragatham, and their uncle (played by Goundermani). Having lost their parents at a young age, Muthu is extremely devoted to his sister and takes it upon himself to care for her. Together with his uncle, he actively searches for a suitable groom for Maragatham.
Pavalam is an orphan who arrives in the same village after the recent death of her father, an alcoholic. With nowhere else to go, she takes shelter in the home of her grandmother, who is a distant relative. By chance, Pavalam accompanies Muthu and Maragatham on a shopping trip, during which the three become acquainted. Impressed by Pavalam's outspoken and cheerful personality, Maragatham begins to see her as a perfect match for her brother.
As time passes, Muthu develops feelings for Pavalam, and she gradually reciprocates his affection. After Pavalam's grandmother passes away, she is left all alone. Taking advantage of her vulnerable situation, the local rowdy Periya Minor and his brother attempt to molest her. Muthu arrives just in time to rescue Pavalam and brings her home, strengthening the bond between them.
Meanwhile, Muthu succeeds in finding a suitable alliance for Maragatham. He chooses Sundaram, a kind-hearted man whom he once witnessed rescuing a poor woman from her abusive, drunken husband. After Muthu approaches Sundaram and his family, Maragatham and Sundaram are married. Sundaram belongs to a large joint family, where relatives play an influential role in every major family decision.
Soon after the marriage, Sundaram's family begins making arrangements for Muthu to marry Sundaram's sister, Gowri. It is then revealed that Gowri's earlier wedding had been called off after her fiancé died on the wedding day, leading the villagers to believe she is unlucky. Sundaram had intentionally searched for a groom who had a sister, hoping that both siblings could marry into each other's families. The marriage broker had deliberately concealed these details from Muthu, resulting in conflict and confusion.
Despite everything, Sundaram's family insists that Muthu marry Gowri. However, Muthu refuses because he is deeply in love with Pavalam. Offended by his decision, Sundaram's relatives force Maragatham to leave their home until Gowri is married, compelling her to return to Muthu's house.
Determined to resolve the situation, Muthu tirelessly searches for a suitable groom for Gowri, but every proposal ends in disappointment. He even approaches Akash's family with a marriage proposal, only to be rejected. During this period, Maragatham becomes pregnant. Understanding Muthu's predicament, Sundaram secretly continues to visit his wife despite opposition from his family. Eventually, Sundaram finds another groom for Gowri, and the wedding is arranged. Maragatham is welcomed back into her marital home, and the two families reconcile.
One day, Muthu rescues Akash and his family from a serious accident. Realizing Muthu's noble character despite having previously humiliated him, Akash's family begins to respect him. However, on the day of Gowri's wedding, it is discovered that the groom is a fraud who has been planted by the Minor brothers to trap Muthu. The groom reveals that the Minor brothers demand Pavalam in exchange for allowing the wedding to proceed. Otherwise, they threaten to cancel the wedding, once again ruining Gowri's future and putting Maragatham's married life at risk.
Muthu courageously confronts and fights the Minor brothers. As Gowri's wedding falls apart, Sundaram's relatives pressure Muthu into marrying Gowri instead. They claim that Pavalam can later be married to someone else from their acquaintance, all while keeping Sundaram unaware of their true intentions. To protect his sister's happiness and preserve her family, Muthu decides to sacrifice his own love and agrees to marry Gowri.
Before the wedding can take place, Gowri reveals everything to her brother, Sundaram. Furious upon learning the truth, Sundaram confronts his relatives and gains even greater respect for Muthu's selflessness. At the last moment, Akash and his family step forward and agree to the marriage. Akash and Gowri are finally married.
In the end, Muthu is reunited with Pavalam, and the two are married with the blessings of both families. The film concludes on a happy note, with both couples embarking on a new chapter of their lives together as husband and wife.