In 1996, Chozhan Ramalingam and Rajiv Paarirajan are two friends who are trained by Paarirajan, Rajiv's father who is an ex-CBI officer to enable them to join the Police. Although given equal training, Chozhan appears to best out Rajiv, causing the latter to turn jealous and develop a deep hatred for the former. One day, Chozhan and Rajiv are playing chess in which Rajiv wins. While Rajiv leaves Chozhan pondering over the outcome, he sees Paarirajan dead on the floor. The boys are escorted to the police station and although Chozhan tells the inspector that he can find out the killer using his skills, Ramalingam, Chozhan's risk-averse father, takes back Chozhan, leaving Rajiv alone.
Years later, Chozhan becomes a departmental store owner, run by his father in Singapore. He secretly thwarts minor crimes to help the Tamil community. One day, a gas company near his store suddenly bursts, which kills 11 Tamil people and severely injures more. Chozhan nabs Joseph, the painter who is responsible and hands him over to the police. The next day, the Indian External Affairs minister who comes to Singapore to address the Tamil people struggles to speak at the gathering and Chozhan immediately senses that her pacemaker had been tampered with, and shoots her in the chest to save her. Chozhan is caught by the police but is later released after they realized he saved her. As soon as Chozhan tips off the police, they nab the culprit revealed to be Rajiv, who is now a criminal. Rajiv, however, escapes by threatening the policemen. Chozhan meets up with Rajiv, who reveals the incident that happened on the day they separated. Rajiv was confronted by Paarirajan who berated him for misusing his skills to loot some money, which made Rajiv kill his father. Upon hearing this, Chozhan warns that he would pay for his mistakes. Instead, Rajiv argues that he has evolved and grown in multiple ways and is way too advanced for Chozhan to intercept, while challenging him to rescue one of his close ones that he would soon kidnap.
To ensure the safety of his loved ones, he calls for a surprise engagement with Ashvitha. He did this to make sure his loved ones are always with him so none of them get kidnapped by Rajiv. At his engagement with Ashvitha, Chozhan realizes that his cousin's daughter, Pinky has gone missing from her school excursion. Soon, Rajiv contacts him and informs him that he kidnapped Pinky from her school to kill her, but Chozhan tells him that he had abducted Rajiv's pregnant wife Anisha. Chozhan threatens to kill Anisha if anything happens to Pinky. Chozhan and Rajiv meet in order to exchange their kins. As Rajiv releases Pinky over to Chozhan, Chozhan says that he would not let go of this issue easily. He gives Rajiv a deal; he would safely transport Anisha back to India if Rajiv surrenders to the police for the deaths of the 11 people. Rajiv agrees reluctantly and surrenders himself. As Chozhan transports Anisha to the airport, a hitman appears and slits her throat.
Meanwhile, in prison, Rajiv finds out about Anisha's death on TV and is anguished. He thinks Chozhan had broken his deal and escapes the prison, by swallowing prawns making him choke. He plots against Chozhan by kidnapping the children of his area and addresses the community that in order to save their children, Chozhan's father Ramalingam must die. Rajiv demands that someone shoot Ramalingam to ensure the safety of the children. No one does so, so Rajiv brainwashes Ramalingam to commit suicide by drinking rat poison. In the meantime, Chozhan saves the children. When Chozhan returns to his community with the children, Ramalingam dies, not before revealing Rajiv's intentions. An angered Chozhan confronts Rajiv inside a skyscraper and after a thrilling fight, Chozhan kicks Rajiv off the building and grabs him by his leg. He informs that he wasn't Anisha's murderer. Rajiv gets shocked at the truth and tries to convince Chozhan to pull him up, but Chozhan drops him off the building leading him to his death.
In the end, Chozhan takes his son and lays flowers on his father's grave, as well as his friend Rajiv's grave.
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