Ed and Karen Parker move their family into a old Connecticut home, needing to be near the hospital where their 14-year-old son in receives cancer treatment. They quickly discover that the building was once a funeral home. Soon, their son Paul proclaims the house to be evil, he begins seeing entities, and his health worsens. Paul's behavior becomes increasingly erratic and, at their rope's end, his parents have him committed to a mental hospital. With the son gone, the whole family is soon under siege by the evil forces inhabiting the house. In desperation, the Parkers contact psychic investigators Edward and Lorraine Warren for help.