Prabhu and Kathir are identical twins. While Prabhu is innocent, Kathir has always been a troublemaker. When Kathir beats up the neighbor kid, their father ties Kathir up in the backyard to a tree. Kathir goes missing overnight, apparently kidnapped by an unnamed psychotic person. Kathir kills the psycho and returns home, where he continues his erratic behavior. Kathir locks Prabhu inside a wooden box and kills his father. Kathir's mother does not turn him in to the cops but instead seeks the help of a local saint. The saint tells her that the twins cannot coexist and have to be separated to save one of them. Frustrated, their mother abandons Kathir in a temple and flees with Prabhu. Years later, Prabhu is a well-settled family man with a loving wife, Bhuvana, and a daughter, Sathya. At the age of 12, Sathya starts developing symptoms of
schizophrenia. She starts talking to some unknown person and often loses sleep. After repeatedly hearing his daughter talk to herself in the middle of the night, Prabhu plants a baby monitor in her room. She breaks the monitor and throws it out of the room, revealing that the unknown person asked her to break the monitor, or else he will kill Prabhu. Worried by the recent happenings, Prabhu takes his daughter to a
psychiatrist. Sathya reveals that the unknown person is Sonu, a small boy who talks to her often. Despite Prabhu and the psychiatrist rejecting Sathya's claim that Sonu exists, Sathya is adamant that Sonu is real. Based on his own research, Prabhu hires a group of young
ghostbusters, whom he came across on
YouTube. The technical team plants technical equipment to monitor the
paranormal activity in Sathya's room. In the middle of the night, the team finds footprints. The door is locked, and they start hearing Sathya's voice again. Terrified and fearing for Sathya's life, Prabhu tries to open the door, but it unlocks itself, and Sathya begins to talk in
Marathi. The crew helps Prabhu understand and translate Sathya's communication. Possessed by Sonu's voice, Sathya reveals that Prabhu has to deal with Kathir and put an end to his atrocities that caused Sonu's death. The psychiatrist suggests that Prabhu fulfill the requests of Sonu's spirit. It is revealed that Kathir, who was abandoned by his mother and Prabhu, struggled to find a livelihood, and people abused him. Unable to control his thirst for killing, Kathir ended up killing them. Eventually, Kathir found the love of his life, Madhuri, a mute woman. They get married and settle in a remote cabin in the forest with twins Sonu and Manu. One day, Sonu hid himself in his father's jeep and followed him to
document his father's hunt. He instead witnesses his father killing a bunch of tourists. Kathir explains to Sonu that he will not be able to understand and requests that he hide this from the rest of the family. Eventually, Sonu told Madhuri and Manu about Kathir's true nature. In fear of losing his family again, Kathir locked up the twins and Madhuri. Despite her pleadings that she will not report to the cops, he refused to leave her and the twins. In the ensuing argument, Kathir ended up accidentally killing Madhuri. Sonu was also accidentally killed in the altercation. Prabhu, Sathya, the psychiatrist, and Prabhu's friend Guna travel to
Chopda, a North Indian hill town backed by huge acres of lush green forests. Sathya's mental health eventually starts deteriorating. Prabhu takes Sathya to Sonu's school. Upon finding Manu, she tries to talk with him, but runs away in fear. She speaks in Marathi and signals in
sign language, gaining Manu's trust. Sathya promises to save Manu from Kathir with his uncle Prabhu's help. Manu asks Sathya and the others to meet him at his home later that night and cautions them to be careful. Prabhu and Kathir eventually meet up after a long time, where Prabhu confesses that he knows about Kathir's urge to kill, pleads with him to leave Manu, and tells him that he will not report anything to the authorities. Kathir vehemently refuses, and a desperate Prabhu fights him. Possessed by Sonu, Sathya exhibits her archery skills and hurts Kathir to stop him from killing Prabhu. Manu threatens Kathir that he will jump down the cliff if Kathir does not stop. Prabhu tackles Kathir off the cliff with him, to their death. Sonu leaves Sathya as a result. Prabhu comes back, climbing the cliff top. He claims that everything has been sorted out and that Kathir is dead. However, Manu asks Prabhu to feel Kathir's existence, using
twin telepathy, to confirm whether he is dead or not, by closing his eyes. It is not revealed whether Kathir is dead, alive, or has possessed Prabhu. When Prabhu suddenly opens his eyes, the screen cuts to black. ==Cast ==