Meet Pyarelal, a simple-minded, naive young man, orphaned at birth, living with a Muslim landlady, Fatima, who treats him like her son. When the police arrest Pyarelal on the charge of murder, no one really believes that this harmless man could harm anyone, leave alone kill. Their belief is shattered when Pyarelal openly admits in Court that he has indeed committed this crime, and demands capital punishment for it.
An invisible maniac kills women who have birthmarks on their face while leaving the police clueless.
After meeting the love of his life at his sister's wedding, Deepak decides to take Rajini to meet his own mother, she fully approves of Rajni and all seems well. However, when Rajni returns after meeting with her mother about the wedding, she claims she never loved Deepak.
The power mad Dr. Shaitan (Sheikh Mukhtar) uses atomic energy to create an army of zombies in an effort to destroy the world. It is up to Dr. Ashok (Prem Nath), and others of goodwill, to try and stop him; but the fight between good and evil results in great destruction.