The explosive series begins with The Night Shift, where ex-sniper Sam Pope leads his own investigation into a bombing at the London Marathon, setting himself on a collision course with some of the most dangerous criminals in London.

When a woman plunges to her death from Edinburgh's iconic Scott Monument, crime reporter Doug McGregor is sent to chase the story behind the shock. But Doug is juggling more than headlines—he's also on the hunt for a notorious rapist, newly unmasked and lurking somewhere close to home. Teaming up with his trusted police contact, DS Susie Drummond, Doug uncovers a chilling connection: the victim was the daughter of a high-ranking Member of the Scottish Parliament.

Hogmanay. New Year's Eve. A dead teenager, another missing. One hell of a case. Meet DS Vicky Dodds. Settling down for a nice Hogmanay with her daughter and her best friend, a phone call pulls DS Vicky Dodds into work and to a deadly new case. A teenage girl, her body cooling in a cold, dark supermarket car park. Found next to her friend’s car, but the driver’s missing too — has the killer taken her? Or is she the killer?

When the chief suspect in the notorious "peekaboo cop killer" case blew himself up, almost taking lead investigator DCI Duncan Bone with him, the psychologically damaged detective thought his days on the force were over. But, when another PC is abducted and murdered in the same deranged peekaboo fashion, Bone is persuaded to return to lead the new investigation.

In the shadow of the Pentland Hills, a man has been callously struck down in front of his home. Tyre marks suggest it was no accidental hit-and-run. Somebody wanted him dead and as the man fights for every breath, they might still get their wish. Grappling with the demons he thought he could leave behind after months away on enforced leave, D.S. Malkie McCulloch resists pressure from his superiors to pass the case on to the road policing unit, convinced that whoever was behind the wheel will be waiting for the chance to finish the job.