| Director | Jerald Arockiam, Jerry, Joseph D. Sami |
|---|
SJ Arts and Science college student Swetha gets murdered in her car on a highway. No one has heard from her since. She had a group of friends from her college. It consists of Jeeva (the college magazine editor), Anjali, Bharath, Vinod (the college prankster), Meera (a drug addict), Sharmi (operator at the college radio station), and Maya (the RJ at the radio station). Jeeva is in love with Anjali, whereas Maya has a crush on Jeeva.
The college is famous for the stories of a serial killing entity Naga, dismissed by many as an urban legend. But Professor Panneerselvam (Panneer) still believes it. There is an old laboratory behind the college built alongside the college. But a fire that happened in 1987 killed all the occupants. Since then, the old lab is rumoured to be Naga's private residence. Anjali and Maya have a bet and go to the abandoned place at night and encounter Vinod, who pranks them.
Panneer then lectures the student about Nagamma (Naga). Naga and a British soldier fell in love with each other. Thus, her own brother kills her by burying her alive. A temple was built over it, and the college was built after demolishing the temple. Since then, Naga is rumoured to be murdering people around. Vinod later tries to trick people, but after he gets tricked by black magic, it turns out that he faked it. Yet, Panner is sceptical about it.
Swetha's death comes to light, but it is framed as an accident. Anjali strongly thinks it is no accident as Swetha is an excellent driver. Inspector Syed suspects it must be one of Swetha's father's business rivals. Vinod brings Anjali to an abandoned forest behind the college and tries to make a move on her. Anjali rejects him because she is in love with Jeeva. Soon Vinod is killed by getting hanged. It happens to be Naga, and Anjali freaks out. She runs back to the hostel and brings Baji, the hostel watchman, to the site. But to her horror, Vinod wasn't there, nor was his car. It seems like there was hardly any struggle. Anjali confines in her friends, confused.
No one believes her, as Vinod is known for his pranks. Still sceptical, Anjali gets more confused. In between all these things, Professor Panneer and Jeeva are acting suspiciously. Anjali goes to the library and discovers a book on Naga. She sees some illustrations which are the same as how Vinod died. Maya and Sharmi join her, and they tease her. Sharmi realises that Vinod was the last one to borrow the book, and it is evident he played a prank on Anjali.
That night, Meera gets attacked in her room by Naga. Anjali comes there, and she hears Meera moaning as the killer has covered her mouth. She thinks she is only using drugs. She doesn't switch on the light and leaves to take a shower. When she comes out, Anjali sees Meera dead and screams. Inspector Syed comes there once again to investigate. It is then revealed that Meera had a very depressing life, which is why she got addicted to drugs.
Anjali then moves to Sharmi's room. Later, Jeeva comes with an old magazine about the laboratory fire incident. They both find out that Panneer was the only survivor there. They, together with Maya, break into Panneer's room to have a look. When they hear someone coming, the three hide inside a secret room behind the shelf. They wait patiently for the person to leave. When they hear the doorknob lock, they relax. Suddenly Anjali screams. Jeeva and Maya realise she screamed because of the Naga outfit behind them. They see a mask with snake embroidery, a black cloak, and an axe. Anjali said a similar axe killed Meera, and they suspect Panneer. When they leave the place, Panneer is shown to be there, and he warns them.
Vinod's mother comes to the college and creates chaos when she realises that her son is dead. Frustrated, Jeeva tarnishes Panneer in the college magazine. As a result, the principal suspends Jeeva for one week while a shocking truth about Anjali is told. Anjali has a police record from her school days. When Jeeva asks her, she refuses to tell him. Jeeva starts to doubt her. Later on, he has an argument with Panneer in the bar where they blame each other.
Maya confides in her friends that all the murders that happened and whatever Anjali said were true. It was indeed according to the illustrations in the book. They figure out that the next murder can occur anywhere in the college. Anjali freaks out when a figure looking similar to Naga is seen near a swimming pool where Maya is swimming. But it turns out that it is just a garbage man. When Maya asks her, Anjali reveals that she suspects that the murders might be related to an incident in her school days.
During Anjali's school days, all of them in their group, except for Jeeva and Maya, went to the same school. During the school carnival on their final year, Whistle Day, all of them ragged a junior student named Saravathy "Sara". They then pretended like they took a nude picture of her. Embarrassed, Sara hangs herself in the classroom, much to the others' shock. Due to their age, the six of them get six months. When Anjali finishes, she tells Maya that three of them are dead, and she is scared. Jeeva listens to them and leaves. He has Sara's picture in his book, which raises the suspicion.
Bharath is locked in the men's toilet during the college annual day function. When he is freed, he is killed shortly afterwards. His disappearance starts bothering the group. Soon Panneer is also murdered. Anjali and Maya go to Jeeva's home, discovering Panneer's dead body. When Jeeva finds them, Anjali knocks him down and informs Inspector Syed. They flee the place. When Syed comes there, Jeeva and Panner are not at the site.
Anjali and Maya are confident that Jeeva is the killer. They wait for Sharmi that night, and Sharmi says she saw Jeeva at the Radio Station. But before Anjali and Maya can warn her that Jeeva is the killer, Naga kills Sharmi. They flee the place but get separated.