Vasanth (Prashanth) is the son of the wealthy MP Gajapathy (Raghuvaran) who hates love and is against love marriage. Vasanth lives a fun-filled life until he meets a girl (Rinke Khanna) when they both rush to save a baby who was about to fall in a railway track. He develops an attraction for that girl and again meets her in his college. He learns that her name is Heena, a Tamil-speaking Bengali girl. Meanwhile, terrorists plot to kill MP Gajapathy in an explosion at a public gathering. Heena, who was on an education trip to Chennai, searched for some books in a bookshop. Since a book was not available that day she has to return to the shop. While leaving the shop a sound comes from her watch alarm in her bag, which she jokes is a bomb that will destroy everything in 20 km. The shopkeeper laughs at her joke.

Heena returns to the shop where the public meeting is conducted. As planned by the terrorists, the bomb explodes, but Gajapathy is only wounded. The shopkeeper immediately decides Heena is the terrorist because of the joke she made during her last visit. Also, the circumstantial evidence is against her. Hence, the police and Gajapathy's men search for her, but Heena escapes. Meanwhile, Vasanth hits one of the terrorists accidentally and finds bombs in his bags. He immediately chases the terrorist, but the terrorist kills himself using poison when the police catch him.

Heena hides in a house that turns out to be the house of Vasanth. Vasanth finds her in the backyard and takes her to his room. Heena denies the charge against her. Vasanth assures her that he believes her and he has to send her back to Kolkata. Vasanth helps her by keeping her in his room without the knowledge of his parents. Both develop an attraction for each other, but Vasanth is keen on sending her home. Heena finds out that he is the son of the man whom she is charged for attempted murder. Vasanth takes her to the railway station and sends her to her native home.

Vasanth lies to his parents and leaves for Kolkata along with his friend to find Heena knowing only her name. He searches for her in many colleges and finally finds her. She is happy to see Vasanth again and takes him to her home and introduces him to her mother (Rati Agnihotri) while her brother left before his arrival. It is revealed that her brother (Sonu Sood) is the mastermind in the plot to kill Gajapathy, which is not known by his family. He learns about the arrival of Vasanth and plans to kill him without knowing he saved his sister. Both Vasanth and Heena become intimate which is disliked by her mother.

She urges Heena to keep away from him which disappoints Heena. Vasanth expresses his love for her. Heena finds out the real identity of her brother and fears that he might kill Vasanth and so she pretends to reject him. Vasanth is hurt by her rejection but does not back off, hoping to win her love one day. Heena informs Gajapathy about all the incidents and makes him come to Kolkata to take away his son.

Gajapathy insists that Vasanth come with him and he unwillingly accepts. Heena's brother learns about Vasanth and Gajapathy and chases after them to kill them. Heena struggles to save them, but Vasanth does not co-operate with her as he wants her to accept him. Heena finally confesses her love and reveals that her behavior is because of her brother's true identity and intentions, which shatters Heena's mother. She unites both of them and asks them to leave the place. Both get into the running train in the nick of time before Heena's brother catches them. and he is arrested by police. The film ends with Vasanth and Heena united.

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