The film starts with a story about a greedy woman who wanted to marry the King. After they got married, they weren't able to live together for a very long time. She departs to live with her former lover by whom she becomes pregnant and gives birth to a boy. The woman secretly takes care of the boy until one day the king becomes aware of him. In anger the King throws the boy into fire. Out of grief, the mother sacrifices her soul to the Satan by hanging herself in front of the house. After hearing this, the King is griefsyriken and falls from his fort and dies. Later the people who lived near the house felt paranormal activities and were killed by the ghost. This news travels to a Buddhist Monk and he offers a visit to Sivankondamalai. There, the Buddhist Monk starts meditating and as he opens his eyes he finds himself in a bungalow and encounters the ghost which threatens to kill him, but the monk traps the ghosts in a magical box and he faints from a concussion. His assistants warn the owner of the bungalow that it is haunted.

The story shifts to present-day Chennai where Kajal (Shanaya) hosts a party for reuniting with her school friends. Then she reveals about her classmate Kumar (Santhanam) who was sent out of school because of Kajal. In the flash back, on Valentine's Day, Kajal gives a card to Kumar and he returns it to her affectionately. This act is seen by a teacher and Kumar is dismissed for it. As the story shifts to the present day, Kumar's uncle Mohan (Karunas) who hasn't paid the due for his truck loses it to the financier (Saurabh Shukla) who is also Kajal's father. As Mohan and Kumar break into the financier's house out of anger, (not knowing that it is Kajal's house) Kajal catches Kumar and hands him over to the police without realizing that he is her childhood crush. The next day, Kumar's father (Anandaraj) standing in front of the police station calls Kajal's father and threatens him to withdraw the case filed on Kumar. Later, Kajal gets Kumar's address and she realizes Kumar is her childhood friend. Simultaneously, Kumar and Mohan plan to kidnap Kajal to teach her a lesson. So, they kidnap her and Kajal reveals herself to Kumar with a kiss and they both fall in love.

Kumar attends a wedding where Kajal is present and as they get personal it is witnessed by Kajal's sister's husband (T.M.Karthik) who misinterprets Kumar as Kapoor family's grandson. When Kajal's father asks Kumar about his family's approval for their union, Kumar brings his family where Kajal's father discovers that they are not a part of the Kapoor family. Kajal's father arranges a marriage for Kajal with another man but it is stopped by Kumar. Defeated, Kajal's father hires a rowdy, Sketch Mani (Rajendran) to kill Kumar. Mani asks Kajal's father to bring Kumar and his family in the name of marriage to the haunted house in Sivankodamalai to murder Kumar and his family and blame it on the ghost. Before they leave, Kumar's mother prays to Lord Muruga and accidentally drops the Vel in the bag and takes it along. But nobody knows that the house is haunted. Mani and his sidekicks enter the house as servants. The magical box containing the spirit still remains in the house.

Later, Mani and his sidekicks start to scare Kajal with the concept of ghost. Mani and his sidekicks try to scare Kumar and Kumar realises that it is just a drama. So Kumar informs this to his family and Kumar asks them to hit anybody in the form of ghost. The monk realizes, that when the moon's light touches the box, the ghost inside it will be released. The monk sends a disciple to get that box, but Kumar's father and Mohan mistake him for an intruder and knock him out. Eventually, the moon's light touches the box and the ghost inside is released. Kumar learns that Mani and his sidekicks are the ones scaring them. Kumar encounters the real ghost and as the ghost starts to haunt the house, the monk arrives and draws one ghost into the box while another ghost enters Kajal's body out of rage. The monk enters a realm where Kajal's soul is trapped and hears a cry calling out for Kumar. The monk sends Kumar into the realm to control the ghost, but he gets trapped there. Fortunately, Kumar's mother takes the Vel and places it in Kumar's hand. As Kumar gains spiritual confidence, he kills the ghost with the Vel.

After a few months, Kajal and Kumar get married and are living happily. Mani returns as a ghost and says, 'This is not the end. This is the beginning'.