Maayaandi Thevan is very fond of his younger sister Virumaayi. She too pours love and affection onto Maayaandi. Virumaayi is married to Sivanaandi from the neighbouring village. Sivanaandi's brother-in-law Periya Karuppu does not like Maayaandi and tries to create a rift between them. During a village festival, he creates a problem between Maayaandi and Sivanaandi, causing the family to split. Periya Karuppu's wife realizes this and commits suicide. Thinking that Maayaandi is the reason for this, Sivanaandi breaks all ties with him and forbids Virumaayi from seeing her brother. Periya Karuppu also dies soon after that.

Years rolls by and Maayaandi's son Seenu comes back to the village after studying in the city. He sees his cousin, Virumaayi's daughter Pechchi and they both rekindle their love. Sivanaandi finds out and tries to separate the couple. He arranges Pechchi's wedding with his nephew Chinna Karuppu, who is a spoiled brat and womanizer. Pechchi, with the help of her mother, escapes home and meets Seenu.

A fight ensues between the two villages, with Maayaandi and Sivanaandi accusing each other for what Pechchi and Seenu did. Chinna Karuppu fights with Seenu, and in the end Seenu wins. Chinna Karuppu says that he is not an enemy to their love but hates his uncle Sivanaandi as he did not help his father Periya Karuppu, leading to his death. At the fighting ground, Virumaayi asks Maayaandi to spare her husband's life, but Sivanaandi tries to kill Maayaandi. Virumaayi comes in between and gets wounded in the neck by Sivanaandi, much to everyone's shock. She removes the nuptial string from her neck, declaring that she does not have any more relationship with Sivanaandi. She dies in her brother Maayaandi's arms. Maayaandi carries Virumaayi while a devastated Sivanaandi looks from afar.