After Govt. Lawyer Dinanath Sharma (
Ashok Kumar) proposes the death sentence on the basis of him being the legal age of 21, regarding Laxman Das' son due to a murder committed by him, he kidnaps Dinanath's son, Gopal, at a function attended by Sharma and his family. He raises Gopal in an environment of crime, naming him Kishan (
Rishi Kapoor), with the plan of Dinanath to kill his son when he reaches the age of 21 himself. However, after a scuffle to protect Chamki (
Rama Prabha) from the goon, Nandu, Kishan ends up at the clinic of Dr. Anand (
Shreeram Lagoo)—who disapproves of his way of life and urges him to reform for the better. Kishan runs away from home with the help of Chamki; whilst running away from his father, Laxman Dada, he finds protection in Dr. Anand's clinic once again, where his blind grandmother mistakes him for Anand's dead, young son, Ratan. For the sake of Anand's blind mother, he must take on the identity of Ratan. Will he manage to begin a new life with his love, Madhu (
Parveen Babi)? Or will his past continue to haunt him? Will Laxman Das succeed? ==Cast==