Police corruption, an investigation that ends in tragedy and the mystery of a little girl's silence - three unconnected events that will prove to be linked by one small town. While Detective Cormac Reilly faces enemies at work and trouble in his personal life, Garda Peter Fisher is relocated out of Galway with the threat of prosecution hanging over his head. But even that is not as terrible as having to work for his overbearing father, the local copper for the pretty seaside town of Roundstone.

Galway 1993: Young Garda Cormac Reilly is called to a scene he will never forget. Two silent, neglected children—15-year-old Maude and five-year-old Jack—are waiting for him at a crumbling country house. Upstairs, their mother lies dead. Twenty years later, a body surfaces in the icy black waters of the River Corrib. At first it looks like an open-and-shut case, but then doubt is cast on the investigation's findings—and the integrity of the police. Cormac is thrown back into the cold case that has haunted him his entire career—what links the two deaths, two decades apart?

They think I'm a young, idealistic law student, that I'm passionate about reforming a corrupt and brutal system. They think I'm working hard to impress them. They think I'm here to save an innocent man on death row. They're wrong. I'm going to bury him.

It's 1975. A baby, minutes old, is forcibly taken from its devastated mother. In 2010, the body of an elderly woman is found in a Dublin public park in the depths of winter. Detective Inspector Tom Reynolds is working the case. He's convinced the murder is linked to historical events that took place in the notorious Magdalene Laundries. Reynolds and his team follow the trail to an isolated convent in the Irish countryside. But once inside, it becomes disturbingly clear that the killer is amongst them....

When a sadistic killer begins picking off victims on the streets of Inverness, Jack’s boss decides to bring in some outside help. But the new team member is an old flame from Jack’s past who isn’t quite ready to let him go. And as the dead bodies rack up, the happily ever after that Jack has been building for himself might just be the next victim to fall....

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?

When young London professional Alex Evans is informed that his sister's body has been pulled from an icy lake in Northern Lapland, he assumes his irresponsible sister accidentally drowned. He travels to the wealthy winter resort where Vicky worked as a tour guide and meets Agatha Koskinen, the detective in charge. Agatha is a no-nonsense single mother of three who already thinks there's more to Vicky's case than meets the eye. As the two form an unlikely alliance, Alex also begins to suspect the small town where his sister lived and died is harbouring secrets. 

The small town of Nannine lies in the harsh red interior of New South Wales. Once a thriving outback centre, years of punishing drought have whittled it down to no more than a couple of pubs and a police station. And its one sinister claim to fame: the still-unsolved disappearance of Evelyn McCreery 19 years ago from the bedroom she shared with her twin sister. Mina McCreery's life has been defined by the intense and ongoing public interest in her sister's case. Now an anxious and reclusive adult, Mina lives alone on her family's sunbaked destocked sheep farm. 

Late at night, two powerful men meet in a secret location to discuss a long nurtured plan about to come to fruition. One is desperate to know there is nothing standing in their way - the other assures him everything is taken care of. Hours later, a high-ranking government official called Ryan Finnegan is brutally slain in the most secure building in Ireland - Leinster House, the seat of parliament. Inspector Tom Reynolds and his team are called in to uncover the truth behind the murder.

The sudden death of a pupil in Fleat House at St Stephen’s—a small private boarding school in deepest Norfolk—is a shocking event that the headmaster is very keen to call a tragic accident. But the local police cannot rule out foul play and the case prompts the return of high-flying Detective Inspector Jazmine ‘Jazz’ Hunter to the force. Jazz has her own private reasons for stepping away from her police career in London, and reluctantly agrees to front the investigation as a favour to her old boss.

Twenty years ago, Cyrus Haven's family was murdered and only he and his brother survived. Cyrus because he hid. Elias because he was the killer. Now Elias is being released from a secure psychiatric hospital and Cyrus, a forensic psychologist, must decide if he can forgive the man who destroyed his childhood. As he prepares for the homecoming, Cyrus is called to a crime scene in Nottingham. A man is dead, and his daughter, Maya, is missing. Then a second woman is abducted. The only witness is Evie Cormac, a troubled teenager with a gift for knowing when people are lying.

When he was nine, and his mother had her first deadly dance with cancer, Harry became a thief. Someone had to find food and pay the mortgage even if his mother was too sick to work. When his mother finally succumbs to cancer, Harry leaves Chicago but somehow he can't quite leave all of his past behind. Harry lives a quiet, careful, rootless life—he can't afford to attract attention or get attached—until he meets Miranda. But just when Harry thinks he has a chance at happiness his old life comes back to haunt him.

On a Dublin city street, packed with afternoon Christmas shoppers, a young woman appears, naked, traumatised and bearing burn marks. Tom Reynolds, now chief superintendent, is no longer head of the murder squad. But when it transpires the woman escaped from a house fire started deliberately and that there are more victims, including a baby, Tom is sucked in. What begins as a straightforward case of arson, soon becomes something much more sinister. The people in that house never wanted to be there in the first place. Now more of them are missing.

Evie Cormac was found at a murder scene six years ago, hiding in a secret room. She has never revealed her real name, why she was in that house, or what she saw. Forensic psychologist Cyrus Haven wants to help the traumatised teenager. He thinks unravelling Evie's secrets will free her from the past. But he has no idea what he's about to unleash....

I was dreading the Cunningham family reunion even before the first murder. Before the storm stranded us at the mountain resort, snow and bodies piling up. The thing is, us Cunninghams don't really get along. We've only got one thing in common: we've all killed someone.