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.

For Helen and George, the remote fixer-upper in Cornwall was supposed to be a dream home, and a way to leave behind the problems they’re both running from. But something about the place feels wrong from day one. And why does Helen have a creeping feeling she’s seen this house before?

In the seaside town of Kinlough, on Ireland’s west coast, three old friends are thrown together for the first time in years. They—Helen, Joe, and Mush—were part of an original group of six inseparable teenagers in the summer of 2003, with motherless, reckless Kala Lanann as their group’s white-hot center. Soon after that summer’s peak, Kala disappeared without a trace. Now it’s fifteen years later.

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.

Cleo knows she should be happy for her brother Mark. He's managed to find someone new after the sudden death of his first wife - but something about Evie just doesn't feel right.... When Evie starts having accidents at home, her friends grow concerned. Could Mark be causing her injuries? Called out to their cliff-top house one night, Sergeant Stephanie King finds two bodies entangled on blood-drenched sheets.

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.

As a sniper with the elite Massachusetts State Police SWAT Team, Bobby Dodge saved a woman and her young son by shooting her armed husband. But vicious rumors begin to circulate the next morning when Bobby loses his gun and his privileges. It turns out the dead man was the son of a prominent Boston judge and had accused his wife of poisoning their son.

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.

With two young children, Mary hasn’t slept in what feels like years. For his part, Tim never feels safe enough to sleep. And so one hot, exhausting night, the two strangers meet while seeking solace in a nearby park. There, they witness something horrific: a violent attack in the window of a neighbouring house. Bonded by what they’ve seen, Tim and Mary are desperate to find answers. And when they see news reports of a missing woman who was last seen walking alone not far from them, the pair are convinced it’s her they saw being attacked—no matter what the police say.

After a scandal forces DI Kelly Porter out of the Met, she returns home to the Lake District. Crimes in the Cumbrian constabulary tend to be minor, but Kelly begins work on a cold case that shocked the local community - the abduction and brutal murder of a 10-year-old girl.