| Director | Nesan, R. T. Neason |
|---|---|
| Genre | action film, drama film |
| Runtime | 185 min |
| Country | India |
| Budget | ₹50 crore |
| Box office | ₹85 crore |
Shakthi is the adopted son of a Madurai-based crime boss, Sivan and is also his right-hand man, bodyguard and driver. Sivan lives happily with his wife, Parvati, Shakthi, his son, Vignesh, and his daughter, Mahalakshmi. Shakthi hates the police force due to a police officer killing his father, who was Sivan's driver, in his childhood. His hatred is such that he hates the khaki colour (which is worn by police in India). Shakthi doesn't let Sivan's watchman wear his Khaki watchman uniform, constantly teases his friend Gopal, who gets selected as a constable, and even loses romantic interest in a woman named Shanthi after he finds out that she is an Inspector.
When Sivan is insulted by Ajay Rathore, a newly appointed police commissioner of Madurai, who wants to wipe the criminal system of Madurai, Sivan forces Shakthi to become an IPS officer to save his crime syndicate and prove the commissioner's words wrong. Reluctantly taking charge as ACP of Madurai City East, Shakthi gives free rein to Sivan and his henchmen, who wreak havoc over Madurai, until one of their activities inadvertently causes a gas leak which destroys a school and some nearby buildings, killing several people, including women and children. The incident, along with the assault of a woman by Sivan's henchmen when she had come to the police station to lodge a complaint against Sivan for killing her husband, shocks Shakthi emotionally and causes him to follow the path of an honest police officer.
Shakti, donning the khaki uniform for the first time, thrashes Sivan's henchmen who assaulted the woman. Sivan does not like Shakthi's new person and after a heated argument between the two. A cat-and-mouse game begins between Sivan and Shakthi, with Sivan and his henchmen determined to humiliate Shakthi at every opportunity. Shakthi, assisted by Shanthi and Gopal, tries to rid Sivan's influence in Madurai. Shakthi is soon promoted to the rank of DCP for his success in arresting most of Sivan's gang members and beneficiaries within one night. Later, Shakthi finds out that Sivan's other adopted son, minister Aadhi Kesavan, is plotting to kill Sivan in revenge for Sivan killing his police officer father (the same police officer who killed Shakthi's father) in his childhood.
Since Shakthi had inadvertently thwarted his earlier plans to kill Sivan, he also plans to get Sivan to kill Shakthi by killing Sivan's son Vignesh and putting the blame on Shakthi for Vignesh's death. Unfortunately for Aadhi, Sivan learns about his plan and reconciles with Shakti, where they fight Aadhi's henchmen and Aadhi. Shakthi beats up Aadhi and gives him to Sivan to kill. Sivan gives Aadhi a choice to kill himself. Aadhi takes up the choice and slits his throat, thereby killing him. The next day, at Sivan's house, as per Sivan's request, the police came to arrest Sivan. Shakti hesitantly arrests him, and they both walk out of the house in a manner reminiscent of their walking style.