| Director | Anal Arasu |
|---|
At a meeting, some men talk badly about MLA Karikalan; it erupts in a scuffle, and Karikalan later buries them alive. After a few days, his wife mourns his loss at his funeral, and Surya, a young juvenile, is imprisoned for a high-profile murder and sent to a juvenile prison. Meanwhile, Ravichandran investigates the high-profile murder. Karikalan's men pay one of the hostel wardens to kill Surya. Firstly, Kutty Guna and his gang try to kill him; however, he brutally beats them up. This incident makes all other juveniles respect him. Marimuthu, Karikalan's father-in-law, tells his daughter Maya to kill Surya before the election, so Karikalan's men hire some ruthless killer juveniles from different states to kill Surya. First, they hack and kill Kaasi, the Democratic Party leader, and bring his head to a police station, and they are sent to the same juvenile prison as Surya. In another assassination attempt, the juveniles stab and attempt to kill Surya, but he defeats them. The other adolescents in the prison hide the weapons and knives that the other boys brought.
The wardens admit Surya and them to the hospital. At the hospital, the corrupt warden attends a phone call from Karikalan's henchmen in the toilet, and another warden, Murugadoss, overhears that they are going to try to kill Surya. At the magistrates', Karikalan's henchmen try to kill Surya with Molotov cocktails and stab him; however, again, he manages to escape. The wardens then see him in a room. Ravichandran meets with Surya, and Surya reveals his flashback
Past: Surya was living happily with his older brother Karna and his mother. Surya and Karna both practice MMA. In a speech, Karikalan promises a job for the winner of the upcoming MMA competition at the harbour. Karna has a relationship with a girl, Kalai. Her brother spots them at the beach. Kalai's parents speak to Karna's mother. In the MMA competition, Jagan, Karikalan's son, and Karna win all their rounds and face each other in the final. Karikalan's men ask Karna to withdraw from the match, but Surya and Karna decline, and Karna wins the final, beating Jagan. Karikalan acts hostile. Karna wins the prize money of 2 lakhs and an appointment letter for a harbour job.
At the hospital, Karikalan finds out that Jagan has been severely wounded and is losing a lot of blood. Maya tells Karikalan's men to kill Karna, so his men beat and stabbed Karna. Karna tells Kalai to go and pushes her off the bridge into the water. Kalai reaches Surya's home and tells him that Karna has been stabbed and kidnapped. Surya and his mother frantically search for Karna at the bridge but cannot find him, so they file a case with the police, where Inspector Thangaraj talks badly about Kalai. Surya's mother goes to the hospital to apologise to Karikalan; his wife Maya slaps Surya's mother. The next day, when Kalai's father goes to open the MMA academy, he sees Karna hanging, impaled by a metal hook with both hands chopped off. His mother, coach, and Surya are shocked when they see him, and Kalai cries at his dead body. She then runs off and dies after getting hit by a train. It is soon revealed that Karikalan and his men tied Karna up, and Karikalan chopped his hands off in revenge for beating up his son. At his brother's funeral, Surya picks up a aruval and brutally hacks Karikalan to death as revenge for killing his brother, shocking his men and the funeral crowd.
Present: After Karikalan's men fail to kill Surya at the court, Karikalan's second son and his friends stab and kill Karikalan's men. Later, as Karikalan's son and gang members enter the juvenile prison, Surya's friends (the adolescents originally inside the prison) stab and kill them, and in a brutal fight, it is revealed that Karikalan's second son and his friends gang raped Kalai, so Surya eventually kills him.
The news reports that Marimuthu and Maya were arrested following the scuffle.