In the story, a fisherman finds a skull wrapped in a cover from a lake on the outskirts of the city. After informing the police about this, the police, unable to find any other clues about the identity of the skull, begin investigations through this skull. The team including ACP Sathyajit (Prithviraj Sukumaran) in charge of the investigation is using the mutilated underwater skull to launch a difficult investigation with the help of scientific methods to find the identity of the deceased.
Meanwhile, Mediti (Aditi Balan), who is presenting a series of mysterious events on a TV channel, rents a house in the city with her child and comes to settle down. After Medha came to live in the house, several mysterious events took place inside the house. Medha meets a woman who communicates with invisible forces and reveals about these mysterious events that take place in her home. Then Medha learns from her about the mystery behind these events.