The story is set in a picturesque landscape in a village called "Krishnapuram". The two tharavadus (parentages) named Puthezhathu and Kizhakkedathu are situated in the same compound, and share a very great bonding. The film begins with the celebration of Onam festival by the inmates of both the houses. Kizhakkedathu tharavadu's karanavar Krishna Warrier (Madhu (actor))'s eldest son Rajan (Siddique (actor))is in love with one of the girls there but his marriage is fixed with Saraswathy (Lena (actress)), daughter of Sankaran Nair (G. K. Pillai (actor)), the karanavar of Puthezhath family. Rajan and the girl elopes, and Saraswathy is later found dead in a quarry, apparently a suicide. Puthezhathu family believes that Kizhakkedathu family has cheated them, and thus they beat up Rajan, but Krishna Warrier comes to rescue him and also pulls him up on to the train. As years pass, Krishnanunni (Dileep) is born to Rajan.