Vinayagam is a brave man living in the village of Oddaanchatram, who lives with his four brothers Murughan, Shanmugham, Kumaaran and Shenthil. They are often caught in fights. Advocate Bail Perumaal bails them out whenever legal issues arise because of their brawls. Vinayagam hates the idea of marriage as he feels that his wife might create disharmony among brothers. Though the four younger brothers pretend they don't want to either fall in love or get married, when Vinayagam is not around, they all have secret lovers. They learn through his brother's childhood friend Collector Subbu that Vinayagam, in his school days, was in love with a girl named Kopperum Devi (fondly called Kopu) and his brothers scheme to find her and reintroduce her to Vinayagam, to rekindle their relationship. But she's married now and has kids. So the brothers conspire to find another woman named Koppuram Devi, because, Vinayagam was not in love with that girl so much as her name, and when he meets another girl with that name, he is sure to lose his heart to her, just because she bears that name. Though initially reluctant later Vinayagam himself falls in love with her. He clashes with a goon called Vanangamudi to take care of market in the village. Vanangamudi tries to kill Vinayagam's brothers while Vinayagam kidnaps Vanangamudi's son after clashing, Vinayagam banishes Vanangamudi from the village.

While travelling in train to Koppu's village, Koppu narrates her family background to Vinayagam. Koppu's father Nallasivam is a respected man in the village who hates violence, while his son is exact opposite who kills people but when he is killed, Nallasivam refuse to bury him and decided to make his village with peace and harmony. Few goons enter into the train, but Vinayagam bashes all the goons, Koppu is shocked to see Vinayagam whom she thought as a non-violent person, where she leaves for her village and tells Vinayagam to never see her again. Vinayagam and his brothers arrive at Koppu's village with clean shaven look he reveals to Koppu that he has changed and he would never harbor violence again, He and his brothers are welcomed and respected by her family. Vinayagam is touched and impressed by their love, affection and hospitality. Vinayagam discovers that a goon named Aadalarasu wants to kill Nallasivam and his family, Vinayagam confronts Aadalarasu in the Central Jail for the reason, which is revealed through flashback that Aadalarasu's father Aavudaiyapan is responsible for blast of matchstick factory. Nallasivam complains against Aavudaiyappan. Aavudaiyappan is arrested, and kills himself by jumping in front of a lorry from a police van.

Aadalarasu swears revenge against Nallasivam, but Vinayagam challenges Aadalarasu that he will protect Nallasivam's family. Vinayagam finishes all the goons and solves all their problems without the knowledge of Nallasivam and family. When Nallasivam's granddaughter finds sickle under Vinayagam's jeep, Nallasivam orders Vinayagam to go out of the town. Aadalarasu who escapes from death penalty arrives to kill Nallasivam but Vinayagam keeps him and his family in a safe place. Aadalarasu informs Vinayagam that he had kidnapped one of his brothers Kumaran, Vinayagam arrives at the nick of time and saves his brother but instead gets attacked by Aadalarasu. Nallasivam and his family who arrives at the place realise the risk taken by Vinayagam to save the family. Though Brutally attacked, Vinayagam rises steadily where he kills Aadalarasu and his henchmen. Nallasivam, who is impressed with Vinayagam's valour gets Vinayagam and Koppu married. Thus, Vinayagam and his brothers get married with great pomp.