A suburban family enjoys a seemingly idyllic lifestyle in their new home until strange phenomena begin to occur. The parents, Steve and Diane, along with their three children—Dana, Robbie, and Carol Anne—start experiencing bizarre occurrences, like objects moving on their own and furniture rearranging itself. It starts playfully but becomes increasingly menacing, climaxing when the youngest daughter, Carol Anne, starts communicating with an unseen presence through the family's television set. Despite the unnerving events, the family initially treats the incidents with a mixture of curiosity and trepidation.

The supernatural activity escalates when Carol Anne is mysteriously drawn into her bedroom closet and disappears, leaving her family in disarray. Frantically searching for her, the couple discovers a link between her vanishing and the static-filled TV screen. Realizing that the events are beyond normal comprehension, they enlist a team of parapsychologists to investigate the disturbances. The experts are fascinated and horrified by the level of supernatural activity in the house, leading them to believe that what they are confronting is not just a mere ghost but something far more malevolent.