Sarveswaran (Sarath Kumar) is a deadly don in Kumbakonam and he runs the underworld chemical bomb business to devastate the entire country. Meantime, we are shown another Sarath Kumar (Suriya) who is an undercover cop and he gets to know the real side through his honest cop friend (Samuthira Kani) who was murdered by the same chemical bomb. On his mission Suriya also encounters Radharavi who is a close friend of Sarveswaran. The rest of the story tells how Suriya knocks down the criminals.