Southern England. August 1936. An artefact from the dark ages - a wolf carved in jet black - is stolen from the archaeology department of St Matthew's College. A man is murdered in an antique store. Historian George Haye translates two eighth-century documents for the investigating police, and is very soon nearly murdered himself. What is it about the documents? Aren't they just letters from one Englishman to another? And why does the wolf from St Matthew's seem to be at the black heart of all the evil that unfolds around him? Haye is desperate. He must find the letters which lead him to the wolf, or he will die. But Haye will find something else. Something he could never have imagined - something long forgotten, something terrifying...