When Clifford Fox QC receives a desperate letter from his estranged younger brother, Simon, he departs his comfortable Yorkshire home to locate him. The letter outlines the harrowing events that have led Simon to the very edge of sanity. Following a stint at the Brentwell Rehabilitation Unit, failed architect and recovering alcoholic, Simon, is invited by an old school-friend to Abbot's Keep - a Tudor residence, nestled deep in remote Berkshire countryside. Soon after arriving he is left to explore the neighbouring monastery ruins and discover the house's dark history. But the more he learns, the more certain he becomes that he is not alone at Abbot's Keep, and that nothing is as it seems. But can he stop the house's medieval past repeating itself one final time? And can his brother find him before it's too late?