In the opening Scene, Rani Kashyap who is a housewife (Taapsee Pannu) is in front of her house feeding the dogs with mutton when suddenly the house is exploded killing her husband who's found with a decomposed hand with a tattoo of his wife's name but nothing else. Police suspects Rani and handles the case to Kishore Rawat (Aditya Srivastava). They lived in Jwalapur, where Rani's husband was a Engineer in the state electricity board.Flashback Reveals that Rishabh Saxena (Vikrant Massey), aka Rishu, resides in Jwalapur along with his mother Lata (Yamini Das) and father Brijraj (Daya Shankar Pandey). He is looking for a girl for marriage, and his search leads him to Rani Kashyap in Delhi. Rishu falls for Rani instantly. Rani has boyfriends in the past and is shown to be passionate and avid reader of cheap crime mystery novels. Lata realizes that Rani is not the simple and homely girl that he is looking for. However, Rishu is adamant. The marriage takes place. Afzar (Ashish Verma) is Rishu's only friend in town. A nervous Rishu (Rani had just yelled at him for not valuing her hotness and not speaking in front of his mom when she yelled at Rani for not being able to cook) fails to consummate the marriage (Afzar was guiding Rishu to be tough with Rani, while Rani's aunt and mom were guiding her to seduce Rishu by revealing her cleavage at every available opportunity in front of him). Lata, meanwhile, starts chiding Rani for lying that she can cook. One day, Rishu overhears Rani speaking to her mother and her aunt that Rishu is not good in bed. Rishu is hurt and retreats into a shell. Rani gets lonely. One day, Rishu's cousin Neel Tripathi (Harshvardhan Rane) comes to stay with the Saxena's. Neel is dashing and well-built (and he can sense the tension in the house between Rishu and Rani), and Rani gets charmed by him. Neel realizes that Rani is attracted to him, and both begin a fling by sharing a hot passionate kiss. Rani falls in love with Neel to the extent that she begins to learn cooking to feed him his favorite dishes.One day, Neel expresses the desire to have mutton. Rani, who is a vegetarian, agrees and goes out to buy meat. The same day, she tells Neel that she would like to end the marriage and move in. A commitment-phobic Neel panics and runs away. Rani is hurt, and she blurts the truth to Rishu. Rishu wanted to have a fresh start, but this confession hurts him even more. RIshu tracks down Neel and attacks him, but Neel beats up Rishu instead. The affair had become common knowledge and street goons started teasing Rani, but Rishu stood up for her. Rani was surprised that Neel ran away, but Rishu fought for her.. She decides to turn Rishu around. A few months later, an explosion takes place in the Saxena residence, killing Rishu. Kishore Rawat, the investigating officer, is sure that Rani had killed Rishu as he thought she helped plan the crime when accidental footage came out that Neel was escaping just before the explosion happened by swimming in a river behind the house.A few months earlier, when Rani blurts the truth to Rishu, his evil side comes out, and he had planned different attempts to hurt Rani (Trips her down the stairs, exploding gas cylinder and so on). However, things are coming out slowly into the positive side when Rani apologizes for her mistake when she tried to attempt suicide. Rishu and Rani run into Neel and when Neel taunts Rani, Rishu tries to run Neel down with his car. Rani realizes the wild side of RIshu for the first time. On one day, Neel visits Rishu's house when Rishu was not home, and he suddenly returned earlier than expected by Rani. Rishu asked Rani to go outside and told them that he could sort out things with Neel. When Rani came back from the market and feeding the dogs with mutton, an explosion takes place, and she cried for Rishu. Kishore Rawat failed to accuse Rani of being the murderer when she cleared the Polygraph even though they knew she tried to fool them with a nail in her shoe to make blood pressure rise for relevant questions indicating innocence, not guilty in the investigation, and she leaves the police station happily.It is revealed that when Neel had come to their house that day, he gets in a fight with Rani and threatens to leak her private videos in his WhatsApp groups. Angered by this, Rishu attacks him, and in the ensuing fight, Rani hits Neel's head with a big piece of mutton to save her husband and accidentally kills Neel. Rishu, not wanting her to go to jail for this, cuts off his own hand and places it there to make it look like his body and runs away from the back exit in Neel's clothes. Rani goes to the market and gets the murder weapon chopped into pieces which she later fed to the street dogs. After 5 years inspector understands everything about the plan (when he reads the cheap crime novel that Rani kept referring to in her testimony) and how Neel died and he praises the couple's love but he thought that the husband is also dead because he read that book in which that hero dies in the river and the case is already closed but the couple escaping the crime reunite, their love now more vital than ever.