David Ash – detective of the paranormal – is sent to the mysterious Comraich Castle, secluded deep in the Scottish countryside, to investigate a strange, high-profile case: a man has been found crucified – in a room that was locked. The reports suggest that the cliff-top castle is being haunted . . .

Who – or what – is the reclusive hooded figure that Ash has seen from the window walking across the courtyard in the dead of night?
What are the strange, animal-like sounds that come from the surrounding woods?
And why are the castle’s inhabitants so reluctant to talk about what they have seen?

. . . what Ash eventually discovers is truly shocking.