As the title GUMNAAM itself hints at some kind of mystery. A mystery about certain mysterious happenings in mysterious surroundings. The happenings are so mysterious that it baffles and surprises the people who are subjected to it. Suddenly a murder takes place and then the series of murder start taking place. The police is also baffled. Nobody knows who is doing it, why is he doing it but it goes on. But police is bent upon solving the mystery. Finally it is proved that it was a case of greed for property or lust for sex.