Arunachalam is a simpleton who is the eldest son of Ammayappan, a reputed rich man from a respectable family in their village Alanganallur. Vedhavalli, a city girl and also cousin of Arunachalam comes to her cousin's (Arunachalam's sister's) wedding. She gets attracted towards Arunachalam and slowly love blossoms between them. Their wedding proposal is happily accepted by the elders in their family except the senior-most person of the family, Arunchalam and Vedhavalli's grandmother, Sr.Vedhavalli. She never likes Arunachalam and always shows hatred. She says something to Vedhavalli's father Aadhikesavan, which makes him reconsider the marriage of Vedhavalli with Arunachalam. The family leaves without informing Arunachalam, which shocks him.