The wonderful mom, Devki is a biology teacher. She is very popular among her students. In one class, Mohit, a student sends her stepdaughter, Arya an offensive video. This makes Devki angry and she throws his phone out. Arya gets an invitation for a Valentine's Day party at farm house. Devki allows her but hesitates to do so. At the party she doesn't interacts much with Mohit and Charles. This outrages Charles, Jagan, Mohit, and watchman Babu, who attack her while she is leaving. They rape her so brutally and dump her in drain along roadside, leaving her almost dead. She is taken to hospital, where she is operated many times. Anand and Devki are exhausted. When she recovers, she gives a statement against the ones responsible for her rape.
Matthew, the inspector gets his hand on the rapists, but the weakens when she is found drinking. Because this claims that she could blame wrong people as she may not remember the real ones.
Due to the lack of evidence, the attackers are found not guilty. Devki had lost faith in court. So she declines when her lawyer tells her to go High court. Arya goes in deep sorrow after the incidence and she is completely lost.
Devki calls detective DK again, whom she met on the same night on which Arya was brutally raped. He agrees to help Devki. Firstly, she takes help from her transgender student who seduce him to get something out, but it doesn't work. Charles is the next victim of Devki. She mixes crushed apple seeds, which is a good source of cyanide in his fitness mix, which leaves him paralyzed.
When Mohit is out for seeeing Charles, Devki leaves the apple seeds at his home, due to which he is arrested in the charge of an attempt to murder. Charles is about to die and Mohit will be declared his murderer. Arya and the inspector suspect that may be this is father of Arya, who is taking Arya's rapists down one by one. But soon he finds Devki's glasses at Mohit's place.
Matthew warns her that Jagan is harsh criminal and he may cause serious harms to her. Jagan recognizes that the mom is the one responsible for these happenings. He finds that she has went for a holiday with her family in Kufri. He kills DK. Matthew gets to know Jagan's plan and goes to save Devki.
Jagan makes a power cut at cottage and shoots his husband Anand. Arya runs out in snow.Inspector gets into the matter as Jagan is just to kill Devki. Matthew advices her not to fire, since she would have to go jail for the crime. Matthew hands over his gun to kill Jagan saying that if you want to kill him, kill him witrh the right gun. This brings Arya back and she hugs her mom.