A chilling prequel to The Amityville Horror, this film depicts the Montelli family’s descent into terror as their new home becomes the site of possession, violence, and murder. Blending haunted house atmosphere, demonic possession, and shocking family tragedy, it is one of the darkest entries in the Amityville cycle and a notorious 1980s horror classic.

Från IMDB:
A dysfunctional family moves into a new house, which proves to be satanic, resulting in the demonic possession of their teenage son.