Samy and Karuna grow up together in the slums of Royapuram. One day, they witness the brutal murder of their teacher by a gangster. While Karuna manages to kill the gangster, Samy tells to the cops that Karuna was responsible for the murder. This sows the seeds of enmity between the two friends. Years later, the hatred between the two continues but Samy falls in love with Karuna's sister. Wikipedia