Custom Officer Harnam Prasad apprehends a smuggling racket being run on the high seas by Heeralal. The gang of Heeralal now seeks revenge against the family of devout Harnam Prasad which comprises his wife Kaushalya Prasad and three sons. They sabotage the picnic bus of his two sons, Ram and Laxman, leading it to being thrown off a cliff and burnt, wherein people assume both to be dead and Kaushalya tries to commit suicide.

The sons are also alive but separated and as they grow older they find out the truth and go for revenge against Heeralal and gang.