Ashok Kumar, [Ajith Kumar] fixes bombs in three places and informs the cops about them. Before the cops arrive, he detonates the bombs. Ashok and his girlfriend Maya, [Nayanthara] threaten her old college mate hacker, Arjun, [Arya] forcing him to hack each system simultaneously. Arjun gets irritated by the things happening around him and complains about Ashok's misdeeds to Inspector Prakash. When Ashok gets closer to achieving his goals, Arjun gives him away to the cops, and both are arrested. Upon discovering his true identity, the police release Arjun. Later, Maya, who had escaped from the scene, tracks Arjun and his girlfriend Anitha and tells them about Ashok's original motive.
Past: A few months ago, Ashok was a former member of the Anti-Terrorist Squad who was on a mission to expose a scam regarding faulty bulletproof jackets given to the security forces, which resulted in many deaths, including his best friend and colleague ACP Sanjay. It turned out that Home Minister Mahadev Rane and his associates JCP Milind Virekar and Ramya Radhakrishnan were the people involved in the scam. Ramya's goons killed Sanjay's pregnant wife and her parents by poisoning, while Maya, whom they also poisoned, and Mango, whom the goons placed on a railway track, survived. Ashok also gets shot and is pushed from a cliff but survives.
Present: After learning about this, Arjun feels guilty and decides to help them. Ashok, Maya and Arjun arrive in Dubai to meet Mahadev's daughter, Deeksha, where Arjun enters a bank in the guise of a service engineer and opens an account so that Ashok can transfer all of Mahadev's money into his account. Maya kills Ramya by pushing her off a building. Deeksha later finds out about their plan but is later threatened at gunpoint by Ashok. Ashok, Arjun, and Maya later arrive in Mumbai but come to know that Mahadev has kidnapped Anitha. Ashok tactfully kidnaps Deeksha and Durrani in Kashmir. Mahadev arrives in Kashmir with Anitha. Here, Durrani and Deeksha get killed while Arjun saves Anitha.
Ashok kidnaps Mahadev and ties him to various bombs, where he questions his corrupt activities. Prakash arrives and calls Ashok to defuse the bombs. Ashok advises Prakash to think from the point of view of a commoner instead of a policeman to determine whether it is right on his part to save a corrupt person. Prakash changes his mind and asks the other police officers to leave him, so the bomb blasts, killing Mahadev. Arjun and Anitha get married, while Ashok transfers Mahadev's illegal money to the Reserve Bank without revealing his appearance. A couple of guys kidnap Arjun and Anitha in Jordan during their honeymoon trip, only to know that Ashok has brought them for another mission.
