LayarKaca 21 – Devaki is a biology teacher in the same school as her step daughter Arya. Arya doesn’t get well with Devki as she looks her only as a stepmother. Mohit a student of the same school sends a lewd video to Arya on her phone following which Devaki throws his phone outside the classroom and asks him to call his parents. At a Valentine days party Mohit decides to revenge and brutally rapes Arya along with his cousin Charles,Watchman Baburam an drug peddler Jagan. The rapist are left free due to their powerful contact. Devaki doesn’t stop here she decides to revenge her daughter’s rapist’s according the information provided to her by detective D.K Kapoor. CBI officer Matthew Francis investigating Arya’s has Devaki as her main suspect during the revenge killings.