Dr. Joseph Benoy (
Vinay Rai) lives with his wife Susan (
Nayanthara), and teenage daughter Anna Joseph (Haniya Nafisa), an aspiring musician who has secured admission to Trinity College, London. During the nationwide
lockdown in India, Dr. Benoy tests positive for
COVID-19, is hospitalised and dies soon after. Anna, who cannot get over her father's death, gets in touch with a Ouija board practitioner (Mekha Rajan) via a video call to help her contact her father's spirit. Unfortunately, the practitioner who seems to initially help Anna apparently worships the devil
Satan and performs a black magic ritual. A few days later, Susan reveals to her father, Arthur Samuel (
Sathyaraj), that she and her daughter have tested positive for COVID-19. Also, Anna has become moody and withdrawn and confines herself to her room. Anna's reclusive behaviour worries Susan who arranges for a therapist to talk to her in an online session. Anna starts talking with the therapist in Malayalam and taunts her about her husband's extramarital affairs. As days pass, Susan notices suspicious activity in her house and sees drawings of inverted crosses in Anna's room. On Arthur's insistence, Susan lets Father Alex (
Avinash) come to their house and perform a prayer. Later, Susan is injured by an evil spirit. Through a Zoom video call with Father Augustine (
Anupam Kher), Arthur and Susan learn that Anna is possessed by a demon who intends to destroy her. He tells her that certain behaviour such as speaking in different languages, having superhuman strength and knowing too much about people's personal lives are all symptoms of demonic possession. Also, he tells Susan about Anna's attempts to contact her father through a Séance ritual. He reveals that the Ouija Board practitioner is a Devil worshipper who summons evil spirits. She had trapped Anna by letting a demon possess her in exchange for wealth. Though reluctant at first, Father Alex finally suggests that an online exorcism might be the only way to save Anna and makes the necessary arrangements. He starts the exorcism with Arthur and Susan in Zoom and warns them not to get distracted by anything. When Susan pours
holy water on Anna, the demon reveals that its name is Curson. It emotionally blackmails Susan by talking in Anna's voice. Ultimately, they exorcise Anna and finally succeed when a statue of
Jesus Christ moves itself and emits bright light, and everything returns to normal. Father Augustine gifts a potted plant to Susan and asks her to plant it in memory of her loved ones. == Cast ==