This was meant to be the perfect trip. The northern lights. A press launch on a luxury cruise ship. A chance for travel journalist Lo Blackwood to recover from a traumatic break-in that has left her on the verge of collapse and to work out what she wants from her relationship. Except things don't go as planned. Woken in the night by screams, Lo rushes to her window to see a body thrown overboard from the next-door cabin. But the records show that no one ever checked in to that cabin, and no passengers are missing from the boat.

Everyone has an idea of what their perfect life is. For Agatha, it's Meghan Shaughnessy's. These two women from vastly different backgrounds have one thing in common - a dangerous secret that could destroy everything they hold dear. Both will risk everything to hide the truth, but their worlds are about to collide in a shocking act that cannot be undone.

Cass is having a hard time since the night she saw the car in the woods, on the winding rural road, in the middle of a downpour, with the woman sitting inside - the woman who was killed. She's been trying to put the crime out of her mind; what could she have done, really? It's a dangerous road to be on in the middle of a storm. Her husband would be furious if he knew she'd broken her promise not to take that shortcut home. And she probably would only have been hurt herself if she'd stopped.

How far would you go to protect your family? Single dad Ben is doing his best to raise his children, with the help of his devoted mother, Judi. And then Ben meets Amber. Everyone thinks this is a perfect match for Ben, but Judi isn't so sure.... There's just something about Amber that doesn't add up. Ben can't see why his mother dislikes his new girlfriend. And Amber doesn't want Judi anywhere near her new family. Amber just wants Ben and the children.

Laura has it all. A successful career, a long marriage to a rich husband, and a 23-year-old son, Daniel, who is kind, handsome and talented. Then Daniel meets Cherry. Cherry is young, beautiful and smart, but she hasn't had the same opportunities as Daniel. And she wants Laura's life. Cherry comes to the family wide-eyed and wants to be welcomed with open arms, but Laura suspects she's not all that she seems.

Someone's getting married. Someone's getting murdered. Nora hasn't seen Clare for ten years. Not since Nora walked out of school one day and never went back. Until, out of the blue, an invitation to Clare’s hen do arrives. Is this a chance for Nora to finally put her past behind her? But something goes wrong. Very wrong.

The 10-day retreat at boutique health-and-wellness resort Tranquillum House promises healing and transformation. Nine stressed city dwellers are keen to drop their literal and mental baggage and absorb the blissful meditative ambiance while enjoying their hot stone massages. They are all on a path to a better way of living. Or at least a better waistline.... Watching over them is the resort's director, a woman on a mission to reinvigorate these bodies and minds. But to what lengths will she go to achieve her goal? These nine perfect strangers have no idea what's about to hit them.

Erin is a documentary filmmaker on the brink of a professional breakthrough, Mark a handsome investment banker with big plans. Passionately in love, they embark on a dream honeymoon to the tropical island of Bora Bora, where they enjoy the sun, the sand, and each other. Then, while scuba diving in the crystal blue sea, they find something in the water....

Anna Fox lives alone - a recluse in her New York City home, unable to venture outside. She spends her day drinking wine (maybe too much), watching old movies, recalling happier times...and spying on her neighbors. Then the Russells move into the house across the way: a father, mother, their teenaged son. The perfect family. But when Anna, gazing out her window one night, sees something she shouldn't, her world begins to crumble. And its shocking secrets are laid bare.

Toby is a happy-go-lucky charmer who's dodged a scrape at work and is celebrating with friends when the night takes a turn that will change his life - he surprises two burglars who beat him and leave him for dead. Struggling to recover from his injuries, beginning to understand that he might never be the same man again, he takes refuge at his family's ancestral home to care for his dying uncle Hugo. Then a skull is found in the trunk of an elm tree in the garden - and as detectives close in, Toby is forced to face the possibility that his past may not be what he has always believed.

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 Ella Longfield overhears two attractive young men flirting with teenage girls on a train, she thinks nothing of it - until she realises they are fresh out of prison and her maternal instinct is put on high alert. But just as she's decided to call for help, something stops her. The next day, she wakes up to the news that one of the girls - beautiful, green-eyed Anna Ballard - has disappeared.

Anne and Marco Conti seem to have it all - a loving relationship, a wonderful home, and their beautiful baby, Cora. But one night when they are at a dinner party next door, a terrible crime is committed. Suspicion immediately focuses on the parents. But the truth is a much more complicated story.

Jane stumbles on the rental opportunity of a lifetime: the chance to live in a beautiful ultraminimalist house designed by an enigmatic architect, on condition she abides by a long list of exacting rules. After moving in she discovers that a previous tenant, Emma, met a mysterious death there - and starts to wonder if her own story will be a rerun of the girl before. As twist after twist catches the listener off guard, Emma's past and Jane's present become inexorably entwined in this tense portrayal of psychological obsession.

In Shaker Heights, a placid, progressive suburb of Cleveland, everything is planned - from the layout of the winding roads to the colors of the houses to the successful lives its residents will go on to lead. And no one embodies this spirit more than Elena Richardson, whose guiding principle is playing by the rules. Enter Mia Warren - an enigmatic artist and single mother - who arrives in this idyllic bubble with her teenage daughter, Pearl, and rents a house from the Richardsons.