In 1975, a baby just minutes old is taken from its devastated mother. In 2010, the gruesome corpse of a nun is found in a Dublin public park. Detective Inspector Tom Reynolds and his team are on the scene and he’s convinced the murder is linked to historical events that took place in the infamous former Magdalene Laundries, institutions for “fallen women.” As Reynolds and his team follow the trail to an isolated convent, everything seems perfectly normal and it seems perhaps they’ve followed the wrong lead. But it soon becomes disturbingly clear that the killer is amongst them.

It's June 2008 and 21-year-old Adam Lattimer vanishes, presumed dead. The strain of his disappearance breaks his already fragile family. Ten years later, with his mother deceased and siblings scattered across the globe, Adam turns up unannounced at the family home. His siblings return reluctantly to Spanish Cove, but Adam's reappearance poses more questions than answers. The past is a tangled web of deceit. And, as tension builds, it's apparent somebody has planned murderous revenge for the events of 10 years ago.

Five years ago, Erin Kennedy moved to New York following a family tragedy. She now lives happily with her detective husband in the scenic seaside town of Newport, Long Island. When Erin answers the door to Danny's police colleagues one morning, it's the start of an ordinary day. But behind her, Danny walks to the window of their 4th-floor apartment and jumps to his death.

Late one night, a man walks into the luxurious home of disgraced banker Harry McNamara and his wife Julie. And when the man launches an unspeakably brutal attack on Harry, a horror-struck Julie, frozen by fear, watches her husband die. Just one hour later, the attacker, J. P. Carney, hands himself into the police and confesses to beating Harry to death. But he also claims that the assault was not premeditated and that he didn’t know the identity of his victim.

Esme has run the guest house for as long as anyone in Ballycove can remember. But in her declining years, her sight is failing, and when she has a fall on the eve of the summer season, she is forced to take a back seat for the first time in her life. From her chair in the entry hall, not much passes Esme by. There's Cora, the wife visiting indefinitely... without her husband; Niamh, the city professional with a life-changing decision to make; and Phyllie, the grandmother whose family is slipping away from her.

Welcome to Stanhope. A safe neighborhood. A place for families. William Wooler is a family man, on the surface. But he’s been having an affair, an affair that ended horribly this afternoon at a motel up the road. So when he returns to his house, devastated and angry, to find his difficult nine-year-old daughter, Avery, unexpectedly home from school, William loses his temper. Hours later, Avery’s family declares her missing. Suddenly Stanhope doesn’t feel so safe. And William isn’t the only one on his street who’s hiding a lie.

On Glenbeg Farm, it was a morning like any other. Only the distressed bark of beloved collie Samson hinted that all was not well. When the bodies of wealthy matriarch Ursula Kennedy and her farmer husband Jimmy are pulled from the slurry pit, shock ricochets throughout the family and community. Everyone has questions, including the gardaí. Was this a tragic accident? Or is there more to it than meets the eye? Their son Rob, once destined for a high-flying legal career, is now involved in the family business.

One year ago, Lucy’s sister, Nicki, left to meet friends at a pub in Dublin and never came home. The third Irish woman to vanish inexplicably in as many years, the agony of not knowing what happened that night has turned Lucy’s life into a waking nightmare. So, she’s going to take matters into her own hands. Angela works as a paper-pusher in the Missing Persons Unit, but wants nothing more than to be a fully fledged member of An Garda Síochána, the Irish police force. With the investigation into the missing women stalled, she begins pulling on a thread that could break the case wide open.

Early one morning on the shore of the Thames, DCI Samuel Owusu is called to the scene of a gruesome discovery. When Owusu sends the evidence for examination, he learns the bones are connected to a cold case that left three people dead on the kitchen floor in a Chelsea mansion thirty years ago. Rachel Rimmer has also received a shock—her husband, Michael, has been found dead in the cellar of his house in France. All signs point to an intruder, and the French police need her to come urgently to answer questions about Michael and his past that she very much doesn’t want to answer.

When an old university friend invites Finn Fitzpatrick to speak at a conference at her alma mater, Finn reluctantly agrees. Now working as a solicitor with a side interest in investigation, Finn is busy with her own troubles but feels she can't say no to her former law school classmate. Even though she has no idea why she's been invited to the conference, or to the exclusive dinner in the College President's private dining room afterwards. Then, three days later, a body is discovered in the College grounds, and everyone who was at the President's dinner is a murder suspect. Including Finn.

Meet the Tobin family. Joy - the mother: Unconscious in a hospital bed, Joy's latest act has thrown the family into turmoil. Frances - the middle child: Seemingly perfect wife and mother, Frances is having inappropriate dreams about an ex, and might be about to derail her whole life. Conor - the protector: Successful and famous, high-flyer Conor is walking a fine line between self-promotion and self-detonation. Sinead - the baby of the family: Bohemian rebel, trying to write the story she needs to tell, but despising herself for failing to do it.

Rachel lives a quiet life in the peaceful countryside, content with her perfect man and her lovely dog. But when she stumbles upon a body in the woods one day, all that shatters. She knows what she has to do: run. Don’t get accused of murder. But when this victim is identified as her boyfriend’s estranged wife, Rachel realises she’s already the prime suspect. With mounting evidence against her, Rachel’s only hope is to keep her past well hidden.

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.

As the middle of five kids growing up in dire poverty, the odds were low on Katriona O'Sullivan making anything of her life. She became a mother at 15 and ended up homeless. Five rackety years followed - barely coping, drinking to escape - until Katriona, now living in her father's native Dublin, hit rock bottom. Poor is the extraordinary story - moving, funny, brave, and sometimes startling - of how Katriona turned her life around.

After an uneventful Friday at the Dublin office, Cathal faces into the long weekend and takes the bus home. There, his mind agitates over a woman named Sabine with whom he could have spent his life, had he acted differently. All evening, with only the television and a bottle of champagne for company, thoughts of this woman and others intrude - and the true significance of this particular date is revealed.