Raja is Chinnathambi's younger brother and is in love with Lalitha, daughter of Nambiar, who is the owner of a grocery store.
People have no choice but to buy his stuff for their daily life as this is the only grocery shop in the entire village.
Chinnathambi is initially reluctant to this marriage, but agrees eventually after talking to Lalitha and learning about her good character.
Chinnathambi, in an emotional climax, gives his brother 2 choices, either to choose him or his entire family wealth in a subtle way.
In the end, it is revealed that Lalitha knows the fact that her son is indeed Seetha's and they all live together happily.