Detective Omkar Nath (D.O.N.)

Kaniza Noor, with a hauntingly beautiful voice, seeks Detective Omkar Nath's help. Her past hides a secret that could ruin her marriage. An old lover, Anil Rai, reappears, demanding money for his silence, threatening her with old letters and photos. She wants the box with these items back. D.O.N has never seen her face, and as he investigates, he falls into a trap. He's accused of smuggling drugs, caught with cocaine in the box supposedly holding the letters. Anil Rai, a smuggler, was murdered by his lover Sapna and friend Raees. D.O.N realizes he can still trap Kaniza, unaware of his arrest. When he meets her, he encounters Julie and later learns both Sapna and Julie are the same. He also meets Anil's wife Kaveri and discovers Sapna was framing Kaveri to get revenge on Raees for cheating her.