Last year, DS Katie Maguire and her team destroyed the biggest drug trafficker in Cork. So how is the city's drug trade at an all-time high? Meanwhile, a spate of violent attacks which leave victims severely disabled has brought confidence in the Garda to an all-time low. As Katie investigates, she realises that the two cases might be connected. Someone is using brain-damaged victims to smuggle drugs into the country. And the only way to find out more is to go in undercover....

In Blarney, Cork, an old millworker's cottage guards its secrets. In 1921 a mother, father and their two young children disappeared from this house. And now, 95 years later, their mummified bodies have been discovered under the floorboards. As DS Katie Maguire investigates, the flames of old family rivalries flare up once more...and Katie is caught in the crossfire.

Kieran O'Regan was responsible for hunting down killers. Now he's become one of the dead: his decapitated body has been found in a graveyard, a tin whistle stuffed into his throat. O'Regan was due to give evidence at a trial for police corruption. His gruesome murder sends a clear message to whistleblowers: only silence is safe. DCI Katie Maguire is determined to uncover the truth. But corruption in the Garda stretches back decades. As more officers are horrifically silenced, Katie must decide whom she can trust.... 

A young girl has been found in a deserted cemetery. She speaks a foreign language, and she cries for her mother. But nobody claims her. Nobody knows who she is. On the streets of Cork, beggars are being horrifically murdered. But why would anyone want to kill the city's homeless? It's up to DS Katie Maguire to find out. Katie's fiancé is fighting his own battle: against illegal puppy farming, a lucrative black market run by Ireland's most fearsome gangs. When the investigations collide, who will Katie save first? 

It started with the judge. He was about to sentence five of Cork's most notorious criminals. But his body has just turned up, beaten and broken, on an isolated road in his burned-out car. Now four members of a rival gang have been shot, and in retaliation three civilians have been blown up. To Katie's horror, Cork is becoming a gang battleground like Dublin. Can Katie save the city? Can she save herself?

One cold spring morning in County Cork, two fishermen find a bundle of rags floating in the Blackwater River. It is the bloated body of Father Heaney. His hands and feet are bound, and his neck bears the marks of garrotting wire. Worse still, he has been castrated. When a second priest is found murdered, his body bruised and beaten and the same savage wound hidden beneath his soutane, Detective Inspector Katie Maguire finds evidence of a sinister cover-up at St Joseph's Orphanage.

The severed head of Micky Crounan, local baker, is grinning gruesomely up from the bottom tier of his own cake. Katie Maguire of the Irish Garda is baffled--until another local businessman goes missing in horrific circumstances. Soon Katie is on the trail of a debt-collecting gang calling themselves the Kings of Erin. But these are very dangerous men. And they will stop at nothing to throw Katie off the trail...

In a grimy flat in the city of Cork, a man lies dead. His face is unrecognisable: seven gunshots have shattered cartilage and bone. Yet DS Katie Maguire, of the Irish Garda, knows exactly who he is. Amir Xaaji Maxamed, an evil man who trafficked young girls to be sold for sex. When a second pimp is killed, Katie must decide. Are these vigilante murders justified? And can she stop them spiralling out of control?

On an isolated farm in southern Ireland, a decades-old grave houses the dismembered bones of 11 women. Detective Superintendent Katie Maguire of the Irish Gardai is used to bloodshed, but these white bones speak of unimaginable butchery. Not far away, a young American tourist is at the mercy of a sadistic killer. His tools are a boning knife, twine, and a doll fashioned from rags, nails, and fish-hooks. The murder of his victims is secondary only to his pleasure at their pain.

When 25-year-old Beth Mullen returns home, expecting to find her twin Rachel waiting for her, the silent house sends a shiver down her spine. She races upstairs to find her beautiful beloved sister cold in her childhood bed, her sparkling blue eyes closed forever, the morning after attending a glittering party.... Newly engaged Detective Lottie Parker knows that Rachel has been murdered the minute she enters the bedroom. Rachel’s neck is bruised and a shard of glass placed in her throat. Confronted with such a horrifying killing, Lottie wastes no time in pursuing every clue. 

How far would you go to bury the truth? While searching for a missing hill walker, Glencoe Mountain Rescue Team uncovers a body - just not the one they were looking for. Still dealing with the fallout from their last case, DCI Jack Logan and his team venture south from Inverness to investigate a brutal, gangland-style execution in the wilds of the Highland countryside. As the victim's dark secrets are gradually revealed, Jack uncovers the rot lurking beneath the stunning scenery, making himself the target of a criminal more dangerous than any he has faced before.

When a young man is found frozen to death on a Highland street in mid-December, DCI Jack Logan initially puts it down to a Christmas night out gone tragically wrong. But, when a postmortem reveals something more sinister, Jack discovers he is dealing with a cold, calculating killer with a long line of victims, a talent for torture, and a perverse sense of justice. 

When Ella Watson, a woman of wealth and status, is brutally stabbed to death in broad daylight, it sends a shockwave through the Lake District community. Later that day, Keira Bradley meets the same fate. But whereas Ella’s murder is a tragedy, Keira’s death on the notorious Beacon Estate is just another statistic in a dangerous place.

Cathy Connolly discovers the bones of a baby concealed in the hem of an old wedding dress. When the dress' original owner, Lavinia Grant, is found dead in a Dublin suburb, Cathy is drawn deep into a complex web of secrets and lies spun by three generations of women. Meanwhile, a fugitive killer has already left two dead in execution style killings across the Atlantic - and now he's in Dublin with old scores to settle. Can the team track him down before he kills again?

When the remains of a brutally murdered young woman are left hanging from the Glenfinnan Monument in the Highlands of Scotland, DCI Jack Logan and his Major Investigations team are dispatched to investigate. At first, the case appears to be fairly open and shut. But, as evidence mounts, Jack uncovers some shocking truths about the victim that risk turning the investigation into a potentially explosive international incident.