Following the death of their parents, Mason McDonnelson and his brothers have been reunited after two years. Their inheritance involves a generous sum of money along with a newly built estate just outside Philadelphia, where the family grew up.
Questioning the stipulations in the inheritance, Mason discovers a set of blueprints that have been locked in his father's desk, along with a letter addressed to all three brothers. The blueprints detail secret compartments in the new house containing a trio of peculiar medallions.
When the house begins exhibiting signs of paranormal activity after a seance gone wrong, Mason feels things start slipping out of control. His brothers start acting out of character, becoming violent, and dark truths about the family are being uncovered.
As the danger grows, Mason is left with a decision that could save his brothers... at the cost of his own mortal life. Maybe some family secrets are best left buried.