Was the biggest case of his career the worst mistake he ever made? Ten years ago, DCI Jack Logan stopped the serial child-killer dubbed "Mister Whisper", earning himself a commendation, a drinking problem, and a broken marriage in the process...When another child disappears a hundred miles north in the Highlands, Jack is sent to lead the investigation and bring the boy home. But as similarities between the two cases grow, could it be that Jack caught the wrong man all those years ago?

Summoned in the early hours of the morning to a Glasgow flat, forensic scientist Rhona MacLeod is confronted by a horrific crime scene. A teenage boy has been found mutilated and strangled to death by a vicious killer. But her grim task of scanning for evidence is made even more unsettling than normal by the boy’s remarkable resemblance to her – and by the fact that she gave up a baby boy for adoption 17 years ago. Overcome by guilt, Rhona sets out to find the boy’s killer and establish whether the young victim is her long-lost son.

Five years ago, DCI John Lomond led the search for notorious Glasgow child-killer ‘The Sandman', until personal tragedy forced him off the case. In Lomond's absence, the killer was never found. Now, with nothing but work left in his life, Lomond remains obsessed with the case–despite the nightmares it brings. When a child is abducted in similar Sandman fashion from an affluent Glasgow suburb, Lomond is brought in to find them before it's too late.

Susie and Stella have nothing in common, except for the fact that they're married to the same man - private detective Mike Hazard. When Mike suddenly disappears, the women discover his double life. The two women soon find out that Mike is keeping more secrets than just his infidelity and his actions soon put them in danger with both sides of the law. They must now track down a missing husband while finding a way to stay alive...

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.

It was meant to be a harmless stag-night prank. But a few hours later, the groom has disappeared and his friends are dead. With only three days to the wedding, Roy Grace is contacted by the man’s distraught fiancée to unearth what happened on that fateful night. The one man who ought to know of the groom’s whereabouts is saying nothing. But then he has a lot more to gain than anyone realizes, for one man’s disaster is another man’s fortune.

The village of Blackrig in the Scottish Highlands was shocked when seventeen-year-old Ailsa Cummings went missing five years ago. While a recent pandemic has stirred up old tensions and sparked an animosity in the small community towards outsiders. Angry that the local estate is to reopen its luxury ‘party house’ to tourists results in an angry mob causing damage to the property’s hot tub, only to unearth the buried body of the missing girl in its foundations. The discovery ignites old suspicions among the villagers, especially the men, who’d known Ailsa.

When a woman's body is discovered in a cathedral and hours later a young man is found hanging from a tree outside his home, Detective Lottie Parker is called in to lead the investigation. Both bodies have the same distinctive tattoo clumsily inscribed on their legs. It's clear the pair are connected, but how? The trail leads Lottie to St Angela's, a former children's home, with a dark connection to her own family history. Suddenly the case just got personal.

When a 15-year-old girl fails to make it home after school, DI Heather Filson believes she’s dealing with just another teenage runaway. The girl’s grandfather, a notorious Glasgow gangster, disagrees. Convinced one of his underworld enemies has grabbed her, he’s prepared to bathe the city in blood in order to bring his princess home.

DS Rakesh Siyal is an idealist. Frustrated as an Edinburgh human rights lawyer, he joins the police, determined to solve the problems he sees with the criminal justice system from the inside, rather than out. His first day as a cop sees him sent down to Galashiels in the Scottish Borders, where he’s given a simple task – return a suspect to Glasgow to face justice.