Plot
Shiva and Shakthi meet in an automobile accident and instantly hate each other, but conspire to help Shiva's cousin brother Sundhar who has fallen in love with Shakthi's sister Meenakshi. Following a series of misunderstandings, Meenakshi's marriage to Gautham is called off and the new match Sundhar was proposed. Meenakshi's parents agree but Sundhar's mother Subadhra insists that Shiva marry first as the eldest son. As Subadhra had killed Shiva's parents to get his property. Though Shiva is a woman hater with no interest in marriage, he says he will marry his employee, Nithya.
Shakthi learns that Subadhra has ill intentions and she threatens to have Meenakshi killed if Shakthi doesn't stop the marriage. Shakthi is suspicious when Nithya disappears, but it turns out that Shiva was never serious about the wedding and paid Nithya to pretend. Shiva's relatives that he marry Shakthi. Shiva thinks Sundhar's life and he accepts to marry Shakthi However, Shakthi also accepts it, and they are married, also Meenakshi and Sundhar married.
Both couples move into the law's family, though Shiva and Shakthi continue to quarrel. Subadhra consults an astrologer and is convinced that there is a threat to Sundhar's life, which is why she tried to interfere with their marriage. Told of this, Meenakshi makes excuses to postpone the consummation of their marriage to save Sundhar, and the couple faces ongoing interference from his relatives. Shakthi later learns that the astrologer is a charlatan.
Aishwarya, Shakthi's cousin moves into the home in a scheme of Subadhra's, and she tries to come between Sundhar and Meenakshi. She also helps to frame Shakthi for the theft of family heirlooms, and then for mental illness. Shiva becomes sympathetic and seems to grow closer to Shakthi. However, he gives her divorce papers on his birthday. Shakthi requests one year to make him fall in love with her, which he accepts.
Shiva's sister Dharani moves into the house and becomes an ally to Shakthi. In a complicated plot they put pressure on Subadhra, and Meenakshi overhears Subadhra and Aishwarya discussing their schemes. Meenakshi confronts them for their underhanded behaviour. Finally Aishwariya leaves the home.
Shakthi's old college friend Ganga begins working for Shiva's business. They conspire to make Shiva jealous by faking calls to Shakthi from a man named Ranjith. Ganga eventually impersonates Ranjith and visits the home, but Shiva gives Ranjith his blessing to marry Shakthi. Ranjith instead challenges Shiva to three tasks to test whether he loves Shakthi. Shiva, however, fails in all three tests and confesses his love for Shakthi.
Subadhra and her comic mother Nagalakshmi hatch many plans to separate Shiva and Shakthi. But Shakthi wins every time and gets much closer to Shiva. When Anu, Shakthi's sister learns about Shakti's divorce through her friend Venkat who is also Shakthi Shiva's divorce lawyer and love interest of Anu, they both plan to make Shiva and Shakthi close. As a part of their plan, they arrange for an outing for the couple, but Subadhra postpones it. A turn of events, it is also revealed that Sundar and Venkat were college buddies. Meanwhile, Shakthi's family move into Shiva's house as their house has been conquered by their owner's son which is a plan of Subadhra to make them stay here and humiliate them which will result in Shakthi leaving the house.
As Shiva and Shakthi's marriage happened in a rush, Shiva and Shakthi's family plans another wedding for them. Subadhra kidnaps Anu and Venkat on the eve of the wedding to frame them of eloping. But Shiva found out about their kidnap and rushed to rescue them, but the goons also kidnap him. Shakthi finds this on the day of marriage and rescues Shiva, Anu, Venkat with the help of Ranveer and a policeman.
Meanwhile, Shakthi's father learns of Subadhra and her mother's schemes and threatens to reveal the truth. Subadhra kills him, which is witnessed by Durga, but her aide prevents Durga from shouting for help. Everybody asks for Shakthi, Shiva, Anu and there comes a letter stating that Anu has eloped with Venkat (letter written by Subadhra) and Subadhra makes Shakthi's father's death as a suicide owing to the elopement of his third daughter which makes everyone believe including Shakthi. Durga later manages to flee from the clutches of Subadhra's hired goon but is knocked down to temporary paralysis.
Later on, Without knowing him, Shiva falls in love with Shakthi and decides to confess his love to Shakthi, but he meets with an accident. Later on, he is admitted to the hospital where the doctor declares that Shiva has lost his memories. On hearing this fact, Shakthi is disappointed, on the other hand, Subhadra and Patti are happy as Shiva would forget about Shakthi. Ranveer, Sundhar, Dharani, Anu and Meenakshi plan to reunite Shiva and Shakthi; they try various things such as reminding Shiva of Shakthi's name, but Subadhra sets multiple obstacles.
At present, a new character Sangeetha is hired by Subadhra to act as Shakthi so that Shiva would forget the real Shakthi. On the other hand, Shiva accepts Sangeetha as Shakthi and he gets her into the house. As Shakthi's family shocked and they decided to hatch the plans to get out her. Now Shakthi leaves the home and she comes as Meera and works in Shiva's office. Days passed on Shakthi meets a new friend Deepa and she stayed in her house. As Subadhra fixed a marriage for Sangeetha and Shiva also with Anu and Venkat on same day. Shakthi feels a lot for Shiva's marriage and she brings Shiva to the Ashramam to get back his past memories. But due to Subadhra's plan, he not cured completely and Shakthi worries. On the day of Marriage function, Deepa knows the truth of Subadhra and she got an evidence that she killed Shakthi's father. As Subadhra tells a thief to kill Deepa, she runs through the marriage hall. On the time of marriage to be end, Shakthi leaves the hall and she decides to go somewhere and live. That time suddenly a light lamp falls on Shiva's head. When he regains consciousness, he recovers his memories. Meanwhile, Shakthi waits for the bus, Deepa saw Shakthi and approaches her. A car hits Deepa, so Shakthi admits her in hospital with the name of her-Shakthi. But Deepa dies. Before she dies, she gave an evidence of Subadhra to Shakthi. As Shiva asked real Shakthi, Sundhar told all the plan of Subdhra and Shiva called police and they arrested Subadhra, Sangeetha and Nagalakshmi. As everyone searched Shakthi, Sundhar attend the call from hospital that one girl named Shakthi has died. Everyone went to the hospital and they all misunderstood that the died girl Deepa was Shakthi. Shiva often worries. Shakthi decides to move to Delhi with a her friend name as Deepa and she joins an company and she stayed there. After Shakthi learns she was pregnant. Finally Shakthi gave birth to a baby boy and Meenakshi gave birth to a baby girl. Shakthi is taken care by her friend Mahendra Singh.
After eight years
Shiva and Shakthi's and Meenakshi and Sundar's respective children have grown up as Pugazh and Mithra. Pugazh hates his father and he didn't even know his father's name. One day Pugazh gone missing and Shiva rescue him. Without knowing that about their relationship Pugazh and Shiva loves each other and Pugazh call Shiva milkyman and Shiva call him milkyboy. They start to meet often and Shakthi felt happy with this. Aditya Yogi Shakthi's boss fall in love with Shakthi but as he learn about her relationship with Shiva he started to hatch plan to marry Shakthi. He did multiple crimes to make Shiva and Shakthi to didn't meet. As Aditya Yogi propose a marriage with Shakthi she frequently agrees with one-sided heart. Shiva also learn that she Shakthi is alive and they got a son which is Pugazh also got to know about Aditya Yogi plan to marry Shakthi so Shiva and Mahendra Singh rushed to the marriage hall. Shakthi also learn that Shiva is not married to Sangeeta that day and has remembered his memories in a YouTube video that Shiva has posted. While Pugazh learn that Shiva is his father he try to stop the wedding but kidnapped by Aditya Yogi and his friend. When Shakthi asked Aditya Yogi to stop the marriage but He blackmail and force her by telling that he kidnapped Pugazh. As reached the marriage hall Shiva and Mahendra Singh rescue Pugazh. Shiva also stopped the wedding and proposes to Shakthi. Aditya Yogi learn his mistake and get them married. Shakthi and Pugazh back to Shiva's home and Subadhra and her mother apologize to her. The rest of the story is about how Shiva and Shakthi going to keep their relationship happy from all the other struggles.
