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 (computer security) Arjun (Arya (actor)), who is forced to hack one system after another. AK then threatens Sriram Raghavan (Aadukalam Naren) by trying to kill his child so that he can extract the truth about black money. AK then murders Sriram. Arjun, who is irritated by the things happening around him, complains about AK's misdeeds to Inspector Prakash (Kishore (actor)). When AK gets closer to achieving his goals, Arjun gives him away to the police, and both are arrested. Arjun is later released after his true identity is revealed.