Seetha and Swathi are sisters from a poor household supported by their mother. Their mother dies and leaves Swathi in Seetha's care telling her that Swathi is now like her daughter. Seetha works to fund Swathi's education, remaining illiterate herself.
Years later
A grown-up Seetha and Swathi meet Rajeshwari, a bad-tempered and arrogant woman who hates poor people. Seetha gets into a fight with Rajeshwari and later apologises to her driver Kalyan. A humiliated Rajeshwari vows to take revenge from the sisters. Kalyan, who is in fact Rajeshwari's elder son, falls in love with Seetha. Swathi tries to commit suicide but is stopped by Seetha who is shocked to find out that Swathi is pregnant with her ex-boyfriend's child. Her ex-boyfriend is revealed to be Ajay, Rajeshwari's younger son.
Seetha helps Ajay and Swathi reunite. Rajeshwari is forced to accept them after Ajay tries to commit suicide. It is then revealed that Rajeshwari is in fact Kalyan's maternal aunt and step-mother. She finds a will bequeathing the entire property to Kalyan and plots to marry him to a sterile woman so he can never have children who can inherit.
Seetha and Kalyan fall in love. Rajeshwari demands Seetha marry her older son Kalyan and sign an agreement that she will never bear children and only then will she agree to Swathi and Ajay's marriage. Seetha agrees and breaks up with Kalyan. Swathi tries to stop Seetha but fails. On the wedding day, Kalyan and Seetha discover they are marrying each other and are shocked.
Seetha tries to win Kalyan's heart but all in vain. She starts working with the kalaakaars at the textile factory and wins them over helping them get their jobs back from Rajeshwari, thus impressing Kalyan. She then helps Kalyan track down his biological mother Ambika who had been accused of murder and is hated by Kalyan's father Venu because of misunderstandings created by Rajeshwari. This brings them closer and he accepts that she must have had a reason for rejecting him.
Later, Seetha gets pregnant too. However, Rajeshwari makes another evil move. She hires goons to kidnap Kalyan. Later, a lawyer named Jayadevan claims that Rajeshwari is his wife. Rajeshwari is shocked and worried.
It is later revealed in a flashback that, Rajeshwari's real name was Radhika Devi. She was from a wealthy family. She fell in love with Jayadevan, the son of a police officer. His father, had wished his son and his nephew, Hariprasad "Hari" to be an officer just like him.
Jayadevan and Hari is happy with the idea. It is also shown that Hari was in love with Jayasudha, the sister of Jayadevan. It is shown that Radhika, desperately wanted to marry Jayadevan. However, Jayadevan denied it to follow his dreams. Agitated, Radhika threatened him that she would commit suicide. Helpless, Jayadevan agrees. Soon, after Radhika gives birth to Aswathy, but she is mentally disabled because of which Radhika hates her and attempts to kill her, which fails.
Meanwhile, Jayadevan is in jail for the crime he didn't commit. After, releasing Jayadevan gets to know of Radhika's evil motives. However, he is shattered to learn that Radhika also murdered his family except Hari. Jayadevan and Hari joins hands to revenge. Jayadevan studies law and becomes a lawyer. Not knowing any of these, Ajay suspects Rajeshwari's evil motives and trusts Jayadevan. However, Jayadevan struggles to tell Ajay that he is Ajay's father.
Seetha brings in two children, Meenakshi "Meenu" and the other is none other than Aswathy "Achu" (She grew up under the care of Jayadevan), now a grown up girl. Achu and Meenu dislikes Rajeshwari. Meenu is later kidnapped, by Annadurai, Rajeshwari's goon.
Kalyan, is now a drug addict. However, Seetha manages to get Rajeshwari arrested and rescues Kalyan and Meenu. Ajay, realises that Jayadevan is his father and Achu is his sister. The show ends joyously with Jayadevan, Ajay, Kalyan, Meenu, Swathi and Seetha rejoicing, Rajeshwari's defeat.
