A killer stalks the streets of London, murdering the richest people in the capital. Is this the work of a serial killer, or just someone angry with the super rich? Or is there another reason why billionaires are being killed every three days? Detective Inspector Simon Wise, reeling from the death of his partner and harbouring more than a few secrets of his own, is assigned to the case. But the killer leaves no clues as to their identity, only bodies in their wake, and each new death sends Wise's team in startling new directions.

DI Jack Knox is called in to investigate a high-profile case. A local distiller’s daughter has gone missing, and when he receives a ransom note, his fears that it is a kidnapping are confirmed. Knox decides to take a serious risk to capture the abductors, but the stakes could not be higher. The father is wealthy and well-connected. If Knox’s gamble goes wrong, he’ll have hell to pay. Meanwhile in the prequel story, 'Labyrinth', the body of an attractive young woman is found in woodland on Edinburgh’s iconic Calton Hill.

D.I. Duncan McAdam is dispatched home to the Misty Isle. A body has been found buried in a remote location on the Waternish peninsula. Well-preserved in the peat, Isla Matheson—missing for the better part of two decades—is revealed to a shocked island community. A teenage runaway is dead...and no one is talking.

When Matt Ballard was starting out his career, three boys were murdered in the same area, the remote and bleak Gibbet Fen. When the main suspect was killed in a hit-and-run, the killings stopped. But Matt was not satisfied that the real murderer had been caught. Over 25 years later, Matt gets a photo in an unmarked envelope. It's of the Gibbet Fen crime scene. And the picture was taken before the murder took place. More photos arrive, relating to the historic murders, as well as intimate pictures of Matt's very secret private life.

Detective Chief Inspector Harry Grimm is forced to take leave from Bristol’s Major Investigations Team when his boss, tired of Harry chasing the ghost of his murderous father, sends him north on secondment. Used to city life and high stress, Harry fears his life will now be spent handing out speeding tickets, finding lost sheep, and directing tourists. But when a local teenager runs away, Harry finds himself pulled into an investigation much worse than anyone could have ever expected.