Sandamarutham is an age previous story of an sincere cop and his mission towards a lethal villain, the one silver lining right here is that Sarath Kumar has performed each the villain and hero. Sarveswaran (Sarath Kumar) is a lethal don in Kumbakonam and he runs the underworld chemical bomb enterprise to devastate all the nation. Imply time, we're proven one other Sarath Kumar (Suriya) who's an undercover cop and he will get to know the actual facet by way of his sincere cop pal Thirumalai (Samuthira Kani) who was murdered by the identical chemical bomb. On his mission Suriya additionally encounters RR (Radharavi) who's an in depth pal of Sarveshwaran. The remainder of the story tells how Suriya knocks down Sarveswaran.