Plot
Sarika is a single woman who stays alone in Mumbai and works at a travel agency. She meets Karan by chance who she smites. Though she initially resists his advances, she eventually gives in to his charms and moves in with him. Life is good, and one day Karan requests Sarika to host one of his friends for a few hours when he won't be home. Sarika agrees, and Karan's friend turns up with a suitcase at Sarika's place and goes out. It's not until the evening news she sees the police is looking for the same man and have labelled him as a wanted criminal. Sarika is shocked and calls Karan, who tells her to get rid of his friend's suitcase that he had left at Sarika's place. Sarika takes the suitcase and steps out when suddenly she is intercepted by cops who arrest her when Karan's criminal friend is at her place. Karan requests her to speak to his lawyer Kamlesh Mathur and not to take his name anywhere in this investigation. The attorney advises her to confess to the crime, convincing her that since she has a clean record and no prior convictions, the judge will accept her mistake as the first time and let her go.
Sarika complies after being convinced that the judge will give her a light sentence and might even set her free for co-operating. But, the judge sentences her to seven years hard labour without parole. Sarika then realizes that Karan and his attorney have tricked her. Karan is an associate to the underworld and that he had her framed to keep police eyes away from him. This realization is soon followed by the death of her father, the ongoing ordeal of prison life and hatred towards Karan. An elder inmate Pramila, who has contacts outside prison, decides to help her. Sarika undergoes a complete change of appearance.
Sarika transforms herslef, inside and out, beginning with her getting rid of her fear of rats. She beats up an abusive inmate Gomati who constantly bullied her. She plans an audacious escape from prison in which she succeeds along with a few inmates. Karan is notified about her escape by Kamlesh Mathur, but Karan gives no further thought. ACP Malti Vaidya sets out to find Sarika after she escapes from prison. Sarika first confronts attorney Mathur.She kills him after learning Karan's whereabouts. Sarika learns that Karan works for a gangster who has many illegal operations under his garb and is in Delhi.
Sarika finds Karan in Delhi with his new girlfriend. She takes a room right opposite to Karan's so that she can keep an eye out when he leaves and comes from his suite. She trails him day and night, without arousing suspicion. ACP Malti Vaidya tracks Sarika when she mistakenly calls her mother from a prepaid sim in Delhi. Karan, in the meantime, is in trouble with a local gangster, Sanjeev, for not laundering money on time. He is picked up from a nightclub by Sanjeev's henchmen and is hauled to his place where he is threatened to clear his dues ASAP or face dire consequences. The whole exchange is witnessed by Sarika secretly. As soon as Karan leaves the room Sanjeev is found killed and the whole suspicion falls on Karan.
Karan is naturally suspected of murdering Sanjeev. Karan and his girlfriend are attacked in the hotel that leaves his new girlfriend and few henchmen dead. He escapes just in time before being caught by ACP Malti who reaches his hotel suite in pursuit of Sarika. Karan is bewildered at Sanjeev's death and his near shave with death wonders if a rival gang bumped off Sanjeev.
Meanwhile, Sarika pretends to run into him. She pretends to have sympathy for him. Karan decides to play with her for some time because she still has not seen through his game. Karan confronts a man whom he suspects to be a traitor, but he believes that somebody else could have sneaked in after Karan went out. Before the man can say anything, Karan kills him, too.
Sarika is amused as Karan gets entangled in a cat-and-mouse game. She steals money from Karan's boss, for which Karan is again made a patsy. However, Karan soon realizes the plot. After he confronts and assaults her, she shocks him by telling him that she has burnt the money. Karan takes her to his boss and makes her confess at gunpoint. But she feigns ignorance and claims that Karan made her say so. As his boss's goons attack Karan, he breaks into a fight. Just then, the ACP enters with the police.
In a shootout, the ACP succeeds in killing Karan's boss. The gang is either killed or apprehended. While the ACP herself gets shot, Karan succeeds in escaping. His success is short-lived: suddenly, Sarika emerges from behind him, holds him at gunpoint and makes him drive to a secluded spot. After knocking him out, she chains him in a cavern infested with rats. As Karan regains consciousness, Sarika tells him how she used to be scared of rats and she chose this spot because she wanted him to go through the pain and suffering that she went through while she was in prison. Karan is baffled, but she leaves him in the cavern, with light from a flashlight pointing towards him.
Karan screams, but nobody hears him as he is in a secluded place. Soon the flashlight goes out and Karan loses his strength. A pack of rats attacks and kill him brutally (shown by dimming of lights and screams). Karan dies a long and painful death. With her mission of exacting revenge from Karan accomplished, Sarika eventually surrenders to the police, turning in the bag of money that she stole from Karan's boss to the ACP. The film ends showing Sarika looking at inmates in a prison and leaves as if she finds her life's purpose.
