| Director | Mani Nagaraj |
|---|
Shiva is the best student at his school. His rival Nithin, the son of a leading film star and a spoiled brat, takes any and every opportunity to knock him down both verbally and physically, and the two are known enemies amongst the other students. Shiva doesn't find much happiness in school other than his classmate and love interest, Maya Srinivasan who later reciprocates his feelings after he saves her from a science lab accident.
One day, Nithin burns Shiva's thesis, and when Shiva finds out, he assaults Nithin in front of the whole school until the school management intervenes. Later, Shiva returns to his class to fight Nithin once again, but this time he finds him dead, with his neck stabbed repeatedly with a sharp pencil. Shiva removes the bloody pencil from Nithin's neck just as Maya shows up, catching him in a most incriminating position. Fortunately for him, she not only believes his innocence, but also offers to help him solve the mystery and catch the real killer – a task made particularly urgent by the fact that in 40 minutes, the rest of the class will return and then the body will be discovered.
The suspects are many: the school driver with whom Nithin has a fight over an open wall behind the school; a local goon who enters the school through the open wall to meet his girlfriend, only to be driven out by Nithin; the chemistry teacher Sridhar (Thirumurugan), whose romantic relationship with his colleague Nandhini (Suja Varunee) ends after Nithin secretly records an intimate video of the two and blackmails Nandhini with that video to do what he says and Nithin's ex-girlfriend Indhulekha (Shamily Sukumar), whose 8-year-old friend Divya is accidentally killed by Nithin when she tries to break up with him and is constantly harassed and blackmailed by Nithin not to report the murder to the school management or the police.
Maya and Shiva go on a wild goose chase to find out who the real killer is. Indhulekha and Shiva's friend, Napoleon helps to find the killer. It then turns out that Divya's father is the killer because he wanted revenge for his daughter's death. Maya and Shiva also seem to be together but a small verbal fight ensues between the two in the end.