This offbeat romantic drama revolves around Vijay, the only son of Vishwanath, an exceptionally wealthy businessman. Spending most of his life in the United States, Vijay has very westernised ideas and does not believe in the institution of marriage. He wishes to live fully in the moment, and enjoy all the pleasures of material living.
Vishwanath desperately wishes for his son to get married and settle into a loving, committed relationship. Under duress, Vijay finally agrees to get married, but under the condition that he would reserve the right to dissolve the marriage at the end of one year.
Radha (Soundarya), Vishwanath's personal secretary, is a hardworking young woman struggling to support her family. Recognising her exceptional qualities, Vishwanath explains his son's unique condition and requests to quit her job and accept the marriage. Although Radha balks at the idea, her family's dire financial situation leaves her no other choice, but to take the risk,
Vijay and Radha are married. After the marriage, they become friendly with each other, and Radha goes out of her way to look after Vijay, especially when he meets with an accident. At the end of the year, however, Vijay decides to annul the marriage, as had been agreed upon.
Radha leaves Vijay and returns home. After the separation, Vijay starts to feel a longing for the presence of his devoted wife. Soon, he realizes her worth and wants her to come back, but despite facing tremendous challenges, she refuses to meekly return to him.
Meanwhile, Radha finds out that she is pregnant. In order to support herself, Radha gets a job in a new company; to her surprise, when the company's managing director arrives, he turns out to be Vijay. He later confesses to her that he's a changed person and wants her back. But, even after repeated persuasion, she disagrees because her faith in him has been shattered.
Vijay continues to pursue her and leaves no stone unturned to show her that he cares for her. Later, Radha and her family hold a ceremony for the well-being of her unborn child. Vishwanath and Vijay attend the ceremony as well, Radha reveals Vijay to be her husband and tells all the guests about the marriage contract. An argument follows; Vijay and his father walk out, followed by all the guests.
Near the completion of her pregnancy, Radha learns that trouble-makers, Dileep (Prakash Raj) and Jayaram (Srihari) who had once attempted to kill Vijay, have escaped from prison. They are once more on the lookout for Vijay, who had fired them from his father's company for cheating and fraud.
Radha gets anxious and tries to reach Vijay as soon as possible. On the way, she learns that the whole thing was a set-up by Vijay's friends to lure her back to her husband. However, Dilip and Jayaram attack Vijay in reality. Enraged, Radha goes to confront Vijay, as soon as she meets him, she accuses him of this shameless act. Radha runs towards him, slips and goes into labor. Vijay, summoning up all his strength, takes Radha to the hospital. There, he is treated for his injuries and she delivers a healthy baby boy. After the recovery, Vijay and Radha reconcile their differences and begin a life together.