Sneha is a middle-class working girl who lives with her aunt Raji. Raji informs her that Karunakaran, a prisoner believed to have killed Sneha's mother, is also her father and Raji's elder brother. Sneha refuses to accept Karunakaran as ...See moreSneha is a middle-class working girl who lives with her aunt Raji. Raji informs her that Karunakaran, a prisoner believed to have killed Sneha's mother, is also her father and Raji's elder brother. Sneha refuses to accept Karunakaran as her father. Sneha falls in love with Dwarkesh, whose father Raghavan opposes the relationship. Sneha works in the same company as Rajiv, Dwarkesh's older brother who eloped with his rich girlfriend Uma, and Raghavan wants nothing to do with him. Sneha and Dwarkesh secretly register their marriage. Uma tries to cause conflict by exposing this. However, Raghavan accepts the marriage when he discovers that Dwarkesh and Sneha are cousins, and they have a ceremonial wedding. Uma tries to become a better person, but her daughter Kushi isn't willing to accept her. To set an example, Sneha accepts Karunakaran as her father - her mother was actually killed by Muthulakshmi - and Kushi does likewise with Uma. Karunakaran is ill and Sneha prepares to donate a kidney, but discovers she is pregnant. When she considers aborting the baby in order to save her father's life, Dwarkesh sends her out of their home, but later believes this was a mistake. It is revealed that Sneha has died, but look-alike Kavitha threatens Dwarkesh and steals money. Sushma wins the heart of the Mayil family. Muthulakshmi plots for Kavitha to impersonate Sneha and kill DK, Karunakaran and Raji, but Kavitha/Sneha is instead reunited with the Raghavan family. To prevent Shankar from forcibly marrying Kashthuri Dwarakesh marries her instead, but is shocked when he later sees Kavitha. Kashthuri and Kavitha then fight to be the wife of Dwarakesh. In Poombarai, Sneha is captured by Sudhakar but released after saving his psychotic brother Dhanush. Dhanush, however, attempts to forcibly marry her, and is arrested by Dwarakesh and Sudhakar. Sushma gives birth to a boy. Sushma and Sneha are jailed for burying Rahul, who was beneath Sushma's bed.They are blamed by Rahul's mother though Muthulakshmi's sister Kanagadurga was behind it. Sushma is later captured by a henchman of Durga, but they are all killed. Sushma returns home and the Mayil family and the Raghavan-Karunakaran family go their separate ways to live in happiness.