Plot summary
The original story starts with Shakthi (Ramya Krishnan) wanting to find her relatives and unite her mother with her uncle Vetrivel Annachi (Vijayakumar) and her father with her aunt Nagavalli (Vadivukkarasi). Still, in a tragic accident set up by Nagavalli, Shakthi's parents die, and she is the only survivor. She returns to the serial after many episodes. She marries Ponnuran (Sai Kiran). Still, after a while, it is revealed that since the accident, Shakthi's twin sister, Archana IAS (Ramya Krishnan), separated from her a long time ago, has been acting as Shakthi. She did this because, after the accident in which her parents died, Shakthi was very ill, so when she met her twin sister, Archana IAS, at the hospital for the first time, she asks her to act as Shakthi and defeat Nagavalli and protect her family. Archana wanted to reveal her true identity later. Still, when the police arrest her husband Ponnurangam for Archana's murder, she is forced to disclose that she is not Shakthi but Archana IAS.
After this moment, Ponnurangam and many of the others in Shakthi's family start ignoring Archana and treating her as an outcast. She is forced even to do house chores. One day, Archana also refuses the Chennai collector post because Ponnurangam told her to do so. Meanwhile, Doctor Madhan (Sakthi Saravanan), who originally intended to marry Shakthi (actually Archana), but married Bhoomika (Sandhiya), dislikes Bhoomika and tries in many ways first to marry Supriya (Reshma Pasupuleti) and then later Actress/ Gwaliyar Ilavarasi Myna (Sandhiya). He succeeds in marrying Myna even though Bhoomika has a child. Archana is also pregnant with twins, but Ponnurangam donates one of his daughters in the hospital to Solaiyamma (K.S. Jayalakshmi) and Krishna, husband of Rukmini. He has lost her child six times. He does this to save Rukmini's life. Solaiyamma later refuses to give him the child because she wants the 500 crores property of Rukmini. Ponnurangam is torn between getting his child back and telling Archana about all this. It is revealed that Bhoomika has been acting as Myna to win Madhan's affection and later Vasantha finds out and Bhoomika and Vasantha have the challenge to see who will make Madhan believe them. Currently, Shakthi lives in Singapore and helps Archana. Rukmini now knows the truth about her cunning mother-in-law and husband and is staying in Archana's house while making Solaiyamma and Krishna believe that she is in Singapore. Roja and Ramamani are trying to find this out. The court has ruled that Subashree is Archana's daughter and Solaiyamma didn't let Rukmini come into her house. Currently, Madhan and Vasantha are trying many ways to get rid of Bhoomika and Solaiyamma is trying to get the 500 crores property of Rukmini. Archana is also trying to protect her family from Kanchana. Now, Bhoomika has found her father because she looks exactly like her mother, Devika, who died 25 years ago. Ponnurangam has now become assistant commissioner due to Archana's work. Now, Madhan has turned right and wants Bhoomika to find a better life. Now Radha reenters the story, and she is pregnant caused by Nandhakumar, who is engaged to Jothika. After a very disastrous marriage, Nandhakumar reluctantly marries Radha and Sarvesh marries Jothika. However Nandhakumar kidnaps Jothika, then Bhoomika, and even Sarvesh in his goal of marrying Jothika. He also creates a dupe of Jothika and erases Jothika and Sarvesh's memories. He fixes a girl from Andhra for Sarvesh, Radhika, whose brother Sudhan, shockingly looks precisely like Dr Madhan. Nandhakumar is unable to marry Jothika as his many attempts are thwarted by Bhoomika, Radha, Archana, and Shakthi. One day, Velayudham reveals that Nandhakumar is not his son but was given to him 25 years ago by Thamba, an evil sorcerer. He has now come back for his son so he can destroy the Ammayi family, but Bhoomika and Velayudham refuse as Nandhakumar should go to jail so Madhan can be released. When Bhoomika tells this to Archana, Thangamma is shocked and later reveals that Archana and Shakthi are the great-granddaughters of Ammayi and Thamba intends to destroy them. Later, Archana shoots Nandhakumar, and he dies. Shakthi also marries DCP Keerthi's brother Sarath Narayanan. Keerthi intends to kill Sarath for what his father Nambikkai Narayanan did to her father, Shankar Narayanan. Keerthi's mother comes back, and Keerthi goes to jail. Sarath's friend Sudhakar turns evil and starts to use a girl named Jeeva to blackmail Sarath. Jeeva is introduced, and the plot thickens Jeeva is the A.O. of P.S. hospital, and the son-in-law of the chairman Suryamoorthy hates Jeeva for getting all the credit. He has a daughter Priya who loves the chairman's grandson Siddharth, but Siddharth loves Jeeva's daughter Iniya. Archana goes to jail for shooting Sarath and Shakthi stands against her.
In a mysterious murder, Radha dies, and Bhoomika vows to find and kill whoever murdered her. Deepa's brother Sudhakar plans to kill Archana, Shakthi, Jeeva, Sarath, and Bhoomika. Vanitha tries to marry her daughter Priya to Siddharth without his consent, but Siddharth secretly marries Jeeva's daughter Iniya with the help of Raj Narayanan. However, Suryamoorthy's wife, Vanitha, is angry. Later she realises her mistake through her father Perumalswamy and accepts Iiniya as her daughter. Then Sundari (Urvashi) comes to Bhoomika's house and sees Radha as a ghost who talks to her and gets scared. It is revealed that Suryamoorthy killed the ten people at the hospital and later Radha and now Urvashi and Deepa (who has now changed) plan to stop him, Shilpa, and Sudhakar. Surya then dies, and Deepa, Shakthi, and Archana plan to save Sarath from Sudhakar. Sudhakar attaches a bomb to himself and tries to destroy Archana and Shakthi's entire family, but Shakthi shoots and kills Sudhakar and keeps everyone. The whole family takes a group photo and serial ends.
