Homemaker Jaya Kapoor (Jayaprada) is happily married and lives with her husband Ravi Kapoor (Jeetendra) and two children, a girl Sahiba, and a baby boy Munna. While being examined at a check-up, she becomes a target of Dr. Rajan Bakshi (Puneet Issar) who molested four more ladies previously. Although she escapes from the check-up, she feels bad and comes home. Traumatized, she tells Ravi, who encourages her to report Dr. Bakshi to the medical board. Her initial accusation and with the help of their journalist friend Varsha Sharma (Varsha Usgaonkar), the four women come forward about Dr. Bakshi assaulting them, and multiple charges are prepared against him. Dr. Bakshi commits suicide to avoid being arrested. All of Rajan's staff members console while one of them swears on Jaya for doing such work while sharing her experience to Bakshi's pregnant widow Anuradha (Anu Aggarwal), who was stressed about her husband's suicide, falls unconscious, goes into pre-term labor, and loses her baby. While recovering in the hospital, she sees a news story identifying Jaya as the one who reported her husband. Unaware of her husband's misdemeanor, she blames Jaya for wrecking their happy married life and swears revenge.
Months later, Jaya looks for a nanny and she unknowingly hires Anuradha, who is going under the alias "Kiran". Anuradha wages a campaign to undermine Jaya in her household. She frequently breastfeeds Munna in secret; this causes him to reject Jaya, as he stops taking her milk. Anuradha encourages Jaya's daughter Sahiba to keep secrets from her mother and tries to turn her against Jaya. Anuradha also suggests to Ravi that he arrange a surprise party for Jaya, leading Varsha and Ravi to meet in secret. Jaya accuses Ravi of having an affair with Varsha and this leads to tension between the couple.
Gangaram (Mehmood), an intellectually disabled gardener who has been assisting the Kapoors and is friendly with Sahiba, discovers Anuradha breastfeeding Munna. To prevent him from exposing her, Anuradha plants nude pictures of Jaya in Gangaram's living quarters which leads Ravi into beating him up and firing him. Unknown to the family, except for Sahiba, Gangaram keeps a watchful eye over them.
A now wary Jaya begins to suspect "Kiran's" hand in all of the recent incidents and suggests to Ravi that they should get rid of her. Anuradha overhears their conversation, and the next morning she boobytraps the greenhouse for Jaya. Varsha discovers Anuradha's identity, but before she can get in touch with Jaya, Anuradha tricks her into going into the greenhouse, where she is killed by the falling glass ceiling. Knowing that Jaya suffers from asthma, Anuradha empties all of Jaya's inhalers and takes Munna out for a walk. When Jaya arrives back home and finds Varsha's bloodied, glass-covered body, she has an asthma attack and is briefly hospitalized. Ravi is left distraught over both Varsha's death and his wife's condition. Seeing Ravi leave, Gangaram tries to prove his innocence and even tells what Anuradha did. Anuradha attempts to seduce him, but he imagines Jaya and tells her feelings to Anuradha (as thought by Ravi). It is stopped when Sahiba calls her father and he gets up, she thinks her plan worked (but it fails).
While Gangaram tells the rest of the deeds done by Anuradha and proving his innocence, Jaya starts hating Anuradha, gets a doubt why Varsha came to her home, and what was the reason. Eventually, Jaya uncovers the truth and confronts her, and reveals the truth to Ravi. Anuradha reveals that she was the reason behind Gangaram's ouster, the fake suspicions against Varsha and Ravi, and the trap made for Jaya (which almost failed), and claims that she and Ravi are having an affair. Ravi denies this claim and kicks her out. Sethia tells Jaya and Ravi to call the police and when Jaya goes to call, Anuradha picks up a knife to kill Jaya, after that she snatches Munna and starts blackmailing Ravi and Jaya. Sethia almost catches her from the back but she manages to escape. Ravi calls the cops and the Kapoor house is placed under protection.
Anuradha breaks into the house, killing the guard, and their friend Sethia, and lures Ravi down to the basement where she hits him on the head, knocking him down the stairs and breaking his legs. Anuradha attempts to take Sahiba and Munna, but after seeing Anuradha assault her mother, Sahiba locks Anuradha in the nursery. Anuradha escapes by breaking the door with a gardening pole and hears Munna in the treehouse. She enters and sees Gangaram aiding the kids' escape. When Jaya enters, Anuradha attempts to kill her but stops after Jaya appears to be having another asthma attack, prompting Anuradha to mock her. As Anuradha tries to take Munna, Jaya gets back up, having faked her asthma attack, and pushes Anuradha out of the treehouse, killing her. Touched at how Gangaram risked his life to protect her family, Jaya welcomes him back into their lives. Jaya, Ravi, and their children lived happily ever after.
