In a series of events involving a stolen diamond, Krishna and Hema get caught in a time machine and travel through the centuries, encountering historical figures and exploring futuristic worlds.

A scientist gets into trouble when he develops a formula that enables the soul to move out of a body and enter the person or animal present in close proximity.

Alex, who is a honest cop, gets his whole family brutally murdered and himself executed by a terrorist leader, Jupiter. Later scientists resurrect Alex by exhuming Alex's body, replace most of his body with cybernetics, leaving his human brain and he becomes Sivan. Sivan, assigned to Alex's former city, proceeds to efficiently rid the streets of crime. Finally Sivan to face Jupiter to Clean the city & to avenge his family..

Agni Nilavu is a 1991 Indian Malayalam Horror film, directed by N Sankaran Nair and produced by Chakravarthy Production. The film stars Jagadish, Mala Aravindan, Ranjini and Risabava in lead roles. The film had musical score by Usha Khanna.