A priest, trying to regain his standing in the church after "falling" and sleeping with a woman, teams with a group of ESP experts to investigate a haunted house. It doesn't help that one of the experts is a beautiful young woman.

When the devil's servants were driven from The Amityville Horror and The Legend of Hell House, they possessed the soul of Heron House and all who dwelt within. Two innocent families have been slaughtered living under the spell of the seductive and demented demons. Now a team of psychic investigators are at the mercy of the spirit of a fallen priest and his minions from hell. Their only hope is a handsome priest, tortured by his secret sins, who confronts the decomposed fiend- challenging his power with the last rites of the church, In the eerie silence, they believe the horror has ended.. until their screams again fill the night.