Rohini (Sarika) is an aspiring actor who is caught shoplifting in a shopping complex. Ranjeet (Marc Zuber), who was watching Rohini, comes to her rescue by pretending to be her partner and they both leave the venue together. Rohini tells Ranjeet of her deep hunger to be an actress while struggling to make ends meet. Ranjeet offers to make her an actress as he owns a theater and produces shows, at the same time making advances towards her. Rohini accepts and returns his sexual advances for a lead role. The director (T.P. Jain) of an upcoming play berates Rohini, who catches the attention of another actor-director Rakesh (Sanjeev Kumar). Rakesh helps Rohini pick up the nuances of acting and she turns into a fantastic performer. They fall in love and get married, however a freak stage accident injures Rakesh, who while trying to protect Rohini loses his eyesight. While in hospital, Rakesh undergoes therapy to come to terms with his blindness and a nurse Sita (Ranjeeta Kaur) helps him learn to read braille and move around using a stick. Despite his efforts to lead a normal life, Rakesh becomes depressed due to his condition and dislikes people taking pity on him, ultimately taking refuge in the love and dedication towards him of his wife, who has quit theatre to take care of her blind husband.

It turns out that Rohini has been having an affair with Ranjeet and plots to be back on stage to continue the affair. She manipulates Rakesh to encourage her to rejoin the theater and request Ranjeet to provide roles for her. To support Rakesh while she is away at the theatre, Rohini hires Sita to be a full-time nurse. During a rehearsal, Ranjeet mistakes Sita for Rohini, but is unapologetic about his physical contact. Sita knows about the affair, but chooses to keep it to herself. One day, while visiting Ranjeet's house to pick up a package, Rakesh finds out about the affair and is distraught. He swears revenge and starts planning by making himself familiar with Ranjeet's house, nearby surroundings, hailing a cab and sound based target shooting. He purchases a voice recorder from Century Bazaar shop and fits it to his residential telephone so that it can record all conversations made through the phone. He creates a situation where Sita leaves her job and a helper dog is purchased by Sita from Mr. Wadia (Dinesh Hingoo) for him to move around, thus proving his inability to perform daily tasks without support.

One day, after listening to a recorded conversation between Rohini and Ranjeet to meet at his apartment at 4 P.M., Rakesh leaves the house in a disguise, without the dog. He finds his way to the apartment and kills Rohini using Ranjeet's revolver. Police assume Ranjeet is guilty and take him into custody. A rather sluggish and annoyingly slow inspector Shatru (Shatrughan Sinha), who is known to crack every murder, is given the case. He believes that Rakesh is the murderer but finds it impossible to get the right evidence.

While Shatru falsely builds a case against Sita as murderer, she confesses to protect Rakesh. Unable to let Sita take the blame for him, Rakesh confesses that he is the real murderer. Judge (Saeed Jaffrey) at the hearing finds it difficult to accept that a blind man can murder someone on his own without being noticed. Rakesh proves his crime by taking the police and the judge through each and every action on the day of the murder. While taking an aim at an alarm clock to show his voice-based target shooting, he accidentally shoots dead Ranjeet, who has just entered his house with