A couple are found dead, having been viciously attacked in their own home. DI Carsten Meyer, a top Met murder detective, assumes it had been the result of a home invasion that had gone wrong. The couple’s money and gold had been taken. But as he dug deeper into the case, there were signs that something much more sinister was going on and as he zeroed in on the killer, he would have to ignore his instincts and consider the unthinkable.