A group of nine childhood friends join an arts college together in a small town. Soon, Shobana becomes a part of their group, joining in the fun and games. Muthu eventually falls in love with her.

The story is narrated through flashbacks. Velu (Sri), a teenager, works in a roadside shop. He meets Jyothi (Urmila Mahanta), who is a maidservant at a few of the nearby apartments. Velu falls in love with Jyothi. Aarthy (Manisha Yadav) lives in one of the apartment buildings. Dinesh (Mithun Murali) is a student who resides in the same building. Dinesh is a spoilt brat. As luck would have it, Aarthy falls for him without knowing his true intentions. Dinesh too is attracted to Aarthy. He seizes the opportunity and shoots video clips of her private moments on his mobile phone and even circulates them among his friends via MMS. When Aarthy finds out, she is aghast and threatens to approach the police. An angry Dinesh tries to murder Aarthy, but Jyothi intervenes accidentally and saves her. She sustains serious injuries in the process. The movie picks up speed as the corrupt Police Inspector Kumaravel (Muthuraman) begins investigations. Kumaravel negotiates with Dinesh’s mother, who is a school correspondent but refuses to later due to her stubborn character and completes the investigation with Dinesh as the culprit of the murder attempt. But Dinesh’s mother approaches a minister with whom she has an affair with and he intervenes with Kumaravel for a negotiation between them. They agree on for an amount of ten lakh rupees. Kumaravel then talks with Velu to stand in the shoes of Dhinesh, if he wants to cure Jyothi. Velu accepts and is sentenced for several years in prison. Kumaravel with the money he got completes the construction of his house and gives nothing to Jyothi.

Looking to put behind a past that haunts him, Nandha tries to reconcile with his mother and live life on his terms.

Murugan (Bharath) is a diligent scooter mechanic in Madurai and life goes on smoothly for the young man until a rich student Aishwarya (Sandhya) sets an eye on him. The infatuation reaches a dangerous level when she coaxes Murugan to take her from the constraint of her family, who have other plans about her future. Initially Murugan hesitates to love her as she belongs to a rich family but later understands her true love and reciprocates. The couple knows that Aishwarya’s family will not agree for the wedding and decide to run away to Chennai. Murugan’s friend Stephen (Sukumar) helps them in their hour of crisis and the lovers unite in marriage. But Aishwariya’s family dotes on her and is not going to give up so easily. The family tracks down the couple and reaches Chennai to meet them. But the family members pretend as if they had agreed for the wedding and convince them to return to Madurai along with them. On the way back to Madurai, the family members take the couple to their farmland where Aishwarya’s relatives have gathered. They all beat Murugan and Aishwarya’s father wants her to remove the mangalyam tied by Murugan. Aishwarya fears that if she does not obey her father, then Murugan will be killed and also Aishwarya agrees to marry another man to save Murugan’s life. Murugan is heavily beaten and let go from the place. After a few years, Aishwarya while travelling with her husband and her child, comes across Murugan where she finds him as a mentally deranged beggar roaming near a traffic signal. Aishwarya faints realizing it is Murugan and gets admitted to the nearby hospital. At night she runs from the hospital to the same signal in search of Murugan and she finds him sitting over there. Aishwarys cries to Murugan and feels bad that she was responsible for his pathetic situation. Aishwarya’s husband also comes to the spot and understands his wife’s situation. He admits Murugan in a mental health center and also takes care of him.
The movie ends with title cards mentioning that this is a true incident narrated by the girl’s husband to the director during a train journey which prompted him to a make a movie.