Siva and Karthik are brothers. Siva is a timid and shy where as Karthik is very outgoing and also very protective of his elder brother. Siva gets the job of a cop when his cop father dies. Siva is transferred to a town where crime rate is high. Karthik goes in the guise of Siva and fights when any situation arises. Siva is much praised by everybody for lowering the crime rate. The rest of the story is about will the villains know that Siva is being protected by Karthik.