Kaala Sona is a 1975 drama starring Feroz Khan, Parveen Babi, Prem Chopra and others. Rakesh's father was killed years ago. His killer died too. Or, so Rakesh thought. But when he finds out that the killer is alive and the police have closed his file, he decides to avenge his father's murder himself. Killer's name is Sardar Poppy Singh as he runs a vast underground business of growing and selling cocaine. Rakesh joins his business. What will he do?