A secret kept for a thousand years. After the dramatic theft of a priceless artefact from Durham Cathedral, the rest of the world believes that DCI Ryan and his team were able to recover and return St Cuthbert's cross to its rightful home. But Ryan knows the cross he recovered was a fake - far from being over, their problems are only just beginning. Just as Ryan and his team begin to unravel the truth behind the spate of mysterious thefts, something even more priceless is stolen - something that can never be replaced. As the nationwide manhunt continues without success, Ryan is thrust into despair - until he realises the answer lies not in modern policing, but in an age-old secret known only to a chosen few. To recover what's been lost, he must first crack 'Cuthbert's Code', following the trail of a long-dead saint across the wild, unpredictable hills and valleys of the borderlands. Can Ryan find what he's looking for, before it's too late? He's going to need a miracle.