For many years the dark and foreboding Margam Castle, long considered one of the most haunted buildings in the UK, has been abandoned - or so it seemed. An American research team led by Professor Annie Holzer and Doctor Daniel Barron take an interest in the Castle`s macabre history of unexplained deaths and supernatural sightings. They travel to Wales to stay at the Castle, intending to conduct a series of experiments in parapsychology. But when night falls the research team`s study goes awry and they`re forced to fight for their lives when they incur the wrath of the vengeful spirits who live within the walls of Margam Castle.
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