[3] Prem is an architect living in Madras with his wife Indhu and sister Subha and her husband Siva.

One day, Indhu and Subha are followed from a shopping mall by two thugs who invade the house posing as delivery men.

Prem's boss gives him an extended business vacation, and he flies to Mysore district, Karnataka to meet a client, Kavitha, and his father.

A few days later, while he is working late at the office, Prem is invited to dinner by Kavitha's father at his gun club.

Back in Madras city, Prem learns from Siva that his sister is severely depressed from the trauma of the assault.

Heartbroken, Prem and his brother-in-law have his sister committed to a mental hospital in Brooklyn, United States for intensive treatment.

But motivated by his desire for revenge, he continues to walk the city streets at night, looking for violent criminals.

On another night, Prem sits as bait in a sleazy restaurant coffee shop surrounded by prostitutes and assorted street people.

His department narrows it down to a list of men who have had a family members recently killed by muggers and who are war veterans.

The D. A. and the police commissioner do not want the fact to get out that street crimes in Madras city have dropped dramatically, since Prem has become a vigilante.

The hoodlums make obscene gestures, but Prem points his right hand like a gun and smiles, suggesting that his vigilantism will continue.