Sonia Sehgal and Naina Sehgal (both played by Kajol) are twins. The two are completely different from each other, Sonia being the outgoing twin and Naina being the shy one. Meanwhile, the police are hunting for a cold-blooded, sadistic killer and rapist, Gokul Pandit (Ashutosh Rana). However tragedy strikes when Gokul rapes and brutally kills Sonia. After Police investigation, Gokul is caught, but is declared innocent as Sunanda, one of the main witnesses and Gokul's fiance gives false statement in court. Naina is distraught and vows to hunt down Gokul. Gokul soon goes after Naina and she realizes she needs help to overcome her fear of Gokul. With revenge in her mind she meets Suraj Singh Rathod (Sanjay Dutt), a blind military veteran and he helps her physically and mentally to defeat her fear of Gokul. While Suraj trains Naina they develop feelings for each other. After an argument, Suraj refuses to meet Naina and she decides to go after Gokul all by herself. One day Gokul kidnaps Naina's younger sister Dia from school in order to scare and warn Naina with what risk she is playing. That day Naina's mother decides to leave for Naintal immediately as her daughter's life is at risk. However Naina cannot control her hatred, and wanted to avenge her sister at any cost. Naina lays a trap for Gokul and tries to kill him but Gokul ties her up and tries to rape her like her sister. Suraj arrives at her house and fights Gokul but ends up being stabbed. Naina gets free and manages to shoot Gokul dead.Suraj recovers from his injuries and decides to go away from Naina, but she realizes that she loves him and cannot live without Suraj. The film ends on a good note as Suraj and Naina get together and move on with their lives.