The plot revolves around Thulasi (Sai Pallavi) and Krishna (Naga Shourya). Thulasi gets pregnant because of Krishna at the age of 19, but their family decides to abort the child. After five years, they get married, but Thulasi is not very happy because of their past. Later, Krishna explains to let go of the past, and soon, she comes out of the pain and starts leading a happy life.

The truth that is happening around Thulasi and Krishna is that their little unborn girl Diya (Veronika Arora) has always been with them all along invisibly. When Krishna's father (Nizhalgal Ravi) comes to meet Krishna at his new flat, Diya sees him and starts following him to his house. The next day, he is found dead in the water tank of their building. This is Diya's plan for revenge. Later, when Thulasi's mother (Rekha) comes to visit Krishna's father's funeral, Diya starts following her and kills her in an elevator in Krishna's construction site. As the death case is handled by Sub-Inspector Raghavan (RJ Balaji (in Tamil)) / SI Agni (Priyadarshi (in Telugu)), he comes to the conclusion that both of them are dead due to asphyxiation.

When Krishna and Thulasi visit the hospital, they meet a doctor (Sujitha), who also happens to die in a car accident because of Diya. There rises a suspicion within the investigating team that whoever meets Thulasi and Krishna are dying due to the same reason. The police also found it suspicious that the doctor's car had child lock on when there was actually no child in the car. One day, Thulasi's uncle (Jayakumar J) comes to visit her. Thulasi looks at her family picture and suddenly realizes that the deaths surrounding them are happening for the same reason:when she was pregnant with Diya, she was forced by her mother, father-in-law, uncle, the doctor, and Krishna to abort the child. Realizing that her uncle may be the next to be killed, Thulasi calls him, but it is too late as a huge container falls on him, killing him. Thulasi thinks that Diya is with her and calls out her name, to which she responds by making the carousel doll move, making Thulasi realize that all the deaths are indeed because of her. She tries to tell this to Krishna and insists that she has to be with him always so that Diya will not kill him, but he does not believe these stories and takes her to a psychiatrist.

One day, Krishna gets a call from the construction site and leaves without telling Thulasi. She panics and calls him, but he hangs up. When she reaches his site, she saves him just in time from a crane carrying a huge block that was about to hit him. Krishna still does not believe in Thulasi's suspicions and at a priest's suggestion to have a Pooja, they make arrangements, but Thulasi dreams about those people burning Diya and she is suffering in pain, so she sends the priests away. Meanwhile, Krishna meets the psychiatrist, who suggests that Krishna go somewhere alone and switch off his phone for two days, and Thulasi will finally stop panicking once he returns safe and sound.

The next day, Krishna is gone, and Thulasi is worried and keeps searching for him. Diya takes this opportunity and tries to kill Krishna by making the walls of his room close in on each other to crush him to death. Meanwhile, Agni/Raghavan thinks that whatever Thulasi says is true and goes in search of her, but he finds that she met with an accident and is unconscious, so he takes her to the hospital, where they try to revive her heart. Thulasi's spirit sees Diya and stops her from killing Krishna. Krishna understands that Thulasi was right. The doctors are able to successfully revive Thulasi, and tears roll from her eyes and she is happy that she finally met Diya. The doctor then says that Thulasi is pregnant.

The movie ends with a message about abortion.[citation needed]