Kaali takes up a job as a college boy's hostel warden in Darjeeling. He finds out that the hostel is beingcontrolled by Michael, the son of a nativehead, Gnanam. Kaali bring about to put a full stop to Michael's playfulness. Kaali gets close with an NRI hostelite Anwar, who is in love with Anu. She is the daughter of a pranic healer, Mangalam. Kaali falls in love with Mangalam.Michael falls for Anu. He tries to harass Anwar and Anu but is stopped by Kaali. He confirms the suspension of Michael and his friends with a video proof. This video is noted far away in UttarPradesh by a nativegangster Jithu, the son of a controllingpolitical figure Singaaram known as Singaar Singh. Singaar and Kaali have a previousenmity and on sighted Kaali and Anwar in the video, he directs his men to Darjeeling to slay them both. Michael directs his men to beat up (but not kill) Kaali. Michael's idea not goes as planned due to Singaar's men. Kaali soothes Singaar's men, after which Anwar studiesaround his past.
Anwar is the child of Maalik, Kaali's best friend. Kaali's is called Petta Velan alias Petta. Twenty years before, in Maduraidistrict, Maalik was in love with Poongodi, who got pregnant before marriage. Petta and his wife Saro manages to convince Poongodi's father Rajapandi.Rajapandi's two sons, Devaaram and Singaar, violently opposed the marriage and thehandover of property to Poongodi. As a result they killed their father. On knowing the truth, Petta, slayedDevaaram and made Singaar move out of the village. In vengeance, Singaar arranged a bomb blast during Poongodi's seemantham. In the bomb blast Maalik, Saro and Saro's son Chinna got killed. Petta discovered that Poongodi was still thriving and saved her. Anwar was born to Poongodi and both left to Australia. On hearing the past, Petta and Anwar, along with Michael plansfor Uttar Pradesh to end the chapter of Singaar.
In Uttar Pradesh, Petta and Anwar meets Jithu, who is strong-minded to murder them both. Petta and Anwar escapes from him. Petta sees Jithu confidentially and conveys him that he is no one other than his son Chinna. When Jithu provokes Singaar concerning his parents, the latter directs his menfolk to kill Jithu, who is saved by Petta. Along with Anwar and Michael, Petta and Jithu gets into Singaar's house and kill him.Petta has a surprise for Jithu and tells him that Jithu is not his son and that he indeed is Singaar's son. He used him to lead and kill Singaar. Petta keeps Jithu at the gun point and the acclaims roll and petta's subsequent move is left uncertain.