| Director | Magizh Thirumeni |
|---|
In Chennai, Thirumaaran works as a financial analyst for Vahjra Motors, a company which manufactures heavy vehicles. Vahjra 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, Vahjra's CEO Ved Tiwari, who is operating in Mumbai, learns that the vehicles actually emit high amounts of pollutants and decides to keep it confidential, unbeknownst to the 18 board members and 20,000 employees. However, the truth comes into the limelight, which enrages Tiwari and shocks the entire company.
Tiwari hires Arjun, an ex-commando-turned-private investigator 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. Arjun suspects JP from Vahjra's Chennai regional headquarters to be the whistleblower and finally catches him. He forces JP to confess the identity of the whistle blower by showing a video of his granddaughter being assaulted and telling him that his son committed suicide after seeing the video. JP tells that he does not know about the whistleblower, but reveals about Vahjra's involvement in corporate funding by buying government factories which resulted in people losing jobs, and also reveals about the whistleblowers involved in exposing various international corporates.
Checking the CCTV footage, Arjun captures Thiru's friend Karthik and kills him, where he also finds that his identity documents are bogus. Arjun finds a surgerical scar in Karthik's body and enquires the hospital about the treatment. He learns that the man posing as Karthik is Gandhi and learns about Thiru, where he also learns that Thiru and Gandhi were best friends who were working as financial analysts in international companies situated in Hong Kong and US. After learning that Thiru is the whistleblower, Arjun learns about Thiru's guardian Bharathi and tries to use her to trace Thiru, but Bharathi commits suicide. Arjun finds about Thiru's ex-girlfriend Maithili and manages to trace Thiru and brings him to an abandoned chemical factory to kill him. However, Thiru manages to finish Arjun and his accomplices.
Later, it is revealed that Thiru's parents, Gandhi's father, and Bharathi's husband were working as chemists in the same abandoned chemical factory, which was purchased by Vahjra Factory. Thiru's parents and Gandhi's father learnt about the chemical pollutants that were leaked by Vahjra and filed a complaint against them, but they were killed by Tiwari and the corporates. Upon learning this, Thiru and Gandhi became whistleblowers to expose Vahjra's illegal activities. The next day, Tiwari dies of a stroke after learning that their deal with TVG, a startup company in Germany, has actually been sold to a Russian mafia company. Due to association with TVG, Vahjra's business is shut down by the government. It is revealed that the TVG startup's chairman is actually Thiru's friend Velmurugan and their plan was to attract Vahjra to shut down the company. Six months later, Thiru joins another company to expose their illegal activities as a whistleblower.