A happy-go-lucky guy lands in trouble after he locks horns with an egoistic lady. Both of them try to outsmart each other during various situations.

Kaththi Sandai is the story of a farmer who becomes a Robin Hood style thief for the welfare of his village. He steals from the people who deny his village of its basic needs and uses the money for its development.

A small-time thief reforms after learning about the role played by his grandfather in building a dam.