This is the new Detective Chief Inspector Henry Christie novel.Willing to do almost anything to escape his humdrum desk job, DCI Henry Christie leaps at the chance to go working undercover again, possibly his last chance ever. His task - to ingratiate himself with Ryan Ingram, one of London's top criminals, who has relocated to the north of England to escape the unwelcome attention of the police down there.Ingram is suspected of many violent crimes, and Henry must put his own life on the line in order to bring about his downfall. But the last thing Henry needs in this dangerous situation is the appearance of a man bearing a fatal grudge that will jeopardise not only himself, but also his family.As Henry attempts to balance his latest case with his personal life, he finds himself dealing with a series of events which begin to spiral murderously out of his control...