Thirumaaran works in a company that manufactures heavy vehicles. His company launches one of the world's highest mileage giving trucks. Due to this, the stocks rise high, and the company receives profits in the share market. However, the chairman learns that the vehicles actually emit high amounts of pollutants, and decides to keep it confidential, unbeknownst to the board members and employees. However, the truth comes into the limelight, enraging the chairman, and shocking the entire company.

He hires Arjun, a private investigator-cum-assassin, who is also ex-military, to track down the whistleblower behind the leaking of the matter. Arjun investigates using violent ways and unearths a network of employees working against the company. He suspects Thiru, from top management, to be the whistleblower. The rest of the story revolves around the cat-and-mouse chase between Thiru and Arjun, with Thiru trying to track down and protect the actual whistleblower.