The Kunnath family is headed by the conscientious schoolteacher Madhavan Nair who has two young sons, Raja and Surya. On the day of village festival, a teenage boy belonging to the rival Puthiayara family is accidentally and unknowingly killed by Madhavan Nair. Not wanting his father's good name to be spoiled, Raja takes the blame himself and is sent to jail, resulting in his father denouncing him. After release, Raja ends up becoming the right hand man of a gangster in Madurai, adopting the moniker "Pokkiri Raja". Cut to 25 years later, Surya has fallen in love with Aswathy who happens to be the stepdaughter of a corrupt police commissioner. When the evil cop frames Surya, puts him in lockup and insults Madhavan master, the broken-hearted father vows revenge by bringing back his elder son Raja to rescue Surya and finish the commissioner. Raja takes up the offer enthusiastically and vows in front of the commissioner to unite Surya and Aswathy in marriage.