Ranga (Rajinikanth) alias Ranganathan who lost his sister Laksmi (K. R.Vijaya) in childhood,comes to the city searching for work suitable for his graduation.He meet Raju (Karate Mani) who is a thief. Ranga advise Raju to give up his crime and be a good man. Raju accept his advise and changes, but Ranga who have changed Raju becomes a hit-man because he feel its better way to survive. Laksmi, now married a wealthy man and had a child called Suresh (Master Suresh). Raju who had changes came across Suresh and saved him from a local thugs.Laksmi, decided to keep Raju as a guardian for Suresh to keep him away from danger. Ranga has taken a contract from Ganga (Radhika) to collect money from the local thugs leader Ravi (Ravindran). However Ravi invites Ranga to join his gang but Ranga declines stating that he does not work for any gang, but is ready to do anything given enough money. Ranga's first assignment with Ravi is to kidnapped Suresh so they can threatened his parent for money. Ranga...