Few believed Professor Coldwell was in touch with an unseen world - that he could commune with spirits. But in Scotland's oldest university town something has passed from darkness into light. And now the young are being haunted by night terrors. And those who are visited disappear. This is certainly not a place for outsiders, especially at night. So what chance do a rootless musician and burnt-out explorer have of surviving their entanglement with an ageless supernatural evil and the ruthless cult that worships it? This chilling occult thriller is both an homage to the great age of British ghost stories and a pacy modern tale of diabolism and witchcraft.