Na-Insaafi is a 1989 Bollywood film directed by Mehul Kumar and it stars Shatrughan Sinha, Chunky Pandey, Mandakini, Sonam in lead roles.
Widowed Judge Kedarnath Sinha lives a happy life with two sons, CBI Inspector Vijay, and College-going Sonu.
He then abducts and rapes Sharda Khanna, leaving her pregnant, something doctors have told her would be fatal...
On his twenty fifth birthday, once Kedarnath tells him that he is Sharda's and Billa's son, Sonu is shocked by the revelation.
Little do the two brothers from the same mother realize that Billa is now the white collared Daaga, who is known to the people of India as a businessman; however it is all a cover as he is now a crime lord.