Simbhu (Silambarasan) is elected college chairman after he beats Charmi (Charmi), the daughter of Ravishankar (Radha Ravi), a minister. Predictably, the two soon fall for each other, though they never directly reveal it. But when Ravishankar comes to know of the love affair, he is staunchly against it and is willing to go any distance to make sure that it never succeeds. At Simbhu’s house, his father (Prakash Raj) mentally tortures his wife (Seetha), since he suspects her of having an affair with her ex-lover. Outside home, Simbhu is helped by Vakkeel Dada (T. Rajendar), a lawyer who makes sure justice is served whatever the means.
The movie deals with the oldest of stories – the poor boy-rich girl love story – and makes no attempts to treat it in a different way or in an interesting manner. It follows the typical sequence of events in such stories.

The story begins with Kunjidhapadam (Aravindan) who comes from a small place to the city for an interview and he manages to find place to stay with his distant relative Subramanyam who is actually a defaulter on loans taken on interest. He is absconding but then leaves his key at a secret place. Kunjidhapadam takes the key and stays and he also manages to get a job. On the other hand, there is Angel (Charmy Kaur) who grows as an orphan and works with a mineral water company. She doesn’t have a place to stay so she locates those houses without occupants and stays there for a night and gets going in the morning. One such instance gets her to Kunjidhapadam’s house. All this apart, there are two dons Pavadai (Kota Srinivasa Rao) and Vembuli (Jayaprakash) who are out to kill each other and Vembuli is successful in killing Pavadai’s son. So he vows to kill Vembuli’s son by the 12th day ceremony of his son. A twist of fate occurs and Pavadai’s goons mistake Kunjidhapadam to be Subrahmanyam and get him to take money. Kunjidhapadam gives an idea to kill Vembuli’s son and he is given a 16-day deadline to kill else Pavadai threatens to kill him

The film revolves around Mantra, a software programmer who lives in a Hostel. She shifts to Hyderabad and starts staying in a mansion owned by Ramarao and Padmini, thanks to the office driver Prasad. But things take a turn when Mantra gets attacked by the unknown. Her childhood friend, ACP Vijay brings her home and takes care of her.
ACP Vijay takes a group of 4 people to investigate the mansion. On their way, people start getting killed. What is the connection with Mantra? What is her relation with Ramarao and Padmini – all this forms the rest of the story.