Rani Kashyap Saxena, a housewife, is outside her home, feeding dogs, when her house suddenly explodes, presumably killing her husband, Rishab "Rishu" Saxena. The police find a body charred-beyond-recognition, with a severed hand which Rani identifies as Rishu's. The movie alternates between the past (narrated in flashback) and the present; the reality of the explosion is interwoven with the police investigation going on in the present-day. A flashback reveals the
arranged marriage between the two, where Rishu fell for Rani instantly, while she married him only because her boyfriend had abandoned her. There remain tensions and awkwardness between her, Rishu, and his family after the marriage. To add to the tense atmosphere, a nervous Rishu fails to
consummate. The next day, he overhears her telling her mother and aunt about his failure to have sex. Hurt, he stops acknowledging her completely and their relation deteriorates. His well-built and charming cousin Neel Tripathi comes over to visit, and Rani gets attracted to him. They subsequently begin a passionate affair. Rani falls in love and even learns how to cook
mutton, despite being a vegetarian. Some time later, she tells Neel that she would like to marry him. Afraid of commitment, Neel panics and flees. Hurt, Rani blurts out the truth to Rishu. He develops a dislike of her but still protects her from others who chastise her actions. Meanwhile, in present-day, the police, aware of the history between Rani and Rishu, are convinced that she and Neel planned and killed Rishu. They use
polygraphs and various methods to find out her motive. They find footage where Neel is escaping from the house moments before the explosion. They also catch Rani cheating during one of the polygraph tests by manipulating her
blood pressure. In the past, after Rani tells Rishu the truth about her and Neel, Rishu transforms into a
sadist and deliberately causes physical harm to Rani multiple times while also trying to kill Neel, who knocks Rishu out when he tries to kill him. Having fallen in love with Rishu, Rani endures it all as repentance. Over time though, they reconcile and genuinely fall in love, becoming intimate. Narrating the events of the day-of-explosion, Rani tells the police that Neel came over to visit and got into an argument with them. Rishu, subsequently, wanting to settle things with him, asked Rani to wait outside. The explosion occurred soon after. The police know that she is lying but fail to find any evidence or misdoing in her polygraph. Rani is subsequently acquitted and leaves the police station smirking. It is revealed that when Neel came over, he tried to blackmail them using Rani's
Sex tapes. Angered by this, Rishu attacked him and both men got into a physical fight. Rani hit Neel over the head with a mutton leg when he had the
upper hand and was strangling him. Not wanting to be jailed, they dress the crime-scene with Rishu cutting off his own hand and placing it next to Neel's body. They rig the gas stove to blow up and Rishu leaves through the backdoor, dressed as Neel. Rani goes out and gets the mutton leg chopped, which she later feeds to the dogs. The explosion occurs and covers up their evidence of murder. Five years later, the police inspector, while leaving town, buys a copy of a murder-thriller book that Rani had talked about multiple times in her statement. Reading the book, he realises the real story but can no longer do anything about it. The ending shows the couple reuniting, Rishu without his left hand. == Cast ==