After busting the consignment of Adaikalam and Anbu by Inspector Bejoy three months ago[c], Amar, the head of a black-ops team, is summoned by Police Chief Jose to bring justice to a group of masked vigilantes, who have killed Stephen Raj (following his arrest and subsequent release after being busted for helping Adaikalam and Anbu), ACP Prabhanjan and his foster father, Karnan. Amar leads the investigation by digging into Karnan's life, as his m... [more] After busting the consignment of Adaikalam and Anbu by Inspector Bejoy three months ago[c], Amar, the head of a black-ops team, is summoned by Police Chief Jose to bring justice to a group of masked vigilantes, who have killed Stephen Raj (following his arrest and subsequent release after being busted for helping Adaikalam and Anbu), ACP Prabhanjan and his foster father, Karnan. Amar leads the investigation by digging into Karnan's life, as his murder seems out of place, since Karnan was a common man and the other two were higher officials in the Narcotics division.Amar learns about Karnan's recent addictions to alcohol, drugs and prostitutes, while at the same time being very protective of his infant foster grandson. While investigating, Amar acknowledged about two missing containers of drugs being hunted by Sandhanam, who runs a much bigger drug syndicate than Adaikalam, named Vetti Vagaiyara. The two containers had to be delivered to his cold-blooded smuggler boss 'Rolex', whose identity is unknown. If the drugs are delivered, Rolex will help Sandhanam form his own government; if not, Sandhanam and his family will be killed. He slowly figures that all of Karnan's addictions were a ruse to cover up a highly covert operation being run by him.Meanwhile, Veerapandian, a PWD officer, assigns a meeting with other gangsters at a theatre, where he reveals that he, along with a contractor named Rudra Prathap, know the location of the drug containers as they want to bring the containers to Rolex, bypassing Sandhanam in