Jaal: Inspector Shankar (Biswajeet) is assigned to investigate the mysterious death of Sunder Singh (Sujit Kumar). During this process, he meets a beautiful young and rich heiress named Sheil (Mala Sinha), who has an impaired memory, and is being looked after by Sunder Singh's aunt (Nirupa Roy). He falls in love with Sheila. Sheila confides in Shankar that she thinks she is haunted by a scarred-faced man. As the investigation progresses, Shankar gets the feeling that the results will change their lives forever.