Insaaf (1966)

When the Judge sentences Bhupendra Kumar to life in prison, he is enraged to find his only son, Rakesh, in love with the former's sister, Rajni, and asks him to leave. Rakesh leaves the home, marries Rajni, they soon become parents of a boy, but Rajni passes away. Rajesh attempts to bring the child on his own but must leave him in the care of his mother, Koshu, when the Badshah's soldiers start a manhunt. He then joins hands with a rebel, also named Rajni, and attacks the Badshah and his men. His mother brings the child up as her son, names him Jugal, who grows up to join the army, and falls in love with the Subedar's daughter, Rekha. Rakesh, who now calls himself Rajesh, kills the Subedar, and is subsequently arrested by none other than Jugal and is to be tried in a court where the Judge is none other than his very own stern and unforgiving father.