A mysterious man along with a young computer hacker tries to unveil a major government conspiracy which resulted in several bloody deaths.

Karan (Shahid Kapoor) is a shy and nerdy canteen boy and college student, running a café with his friend Murugan (Johnny Lever), and Tanya (Rimi Sen) is a student in the same college. She is the most popular girl on campus. Karan is in love with Tanya but

The film starts with Ashok Kumar aka AK (Ajith Kumar) setting bombs in three places and informing the police about them. Before the police arrive, the bombs are set off. AK, along with his lady love Maya (Nayanthara), threatens her old college mate hacker