It's a blindingly hot summer. International visitors surge into Sydney's Darling Harbour. Two-year-old Tommy is sailing his toy boat in the park there with his mother Phoebe. Tommy vanishes into thin air. The following winter, taunting notes written as nursery rhymes begin arriving at his parents' home. Little Boy Blue, where did you go? Who led you away? Only I know.

It was summer in the mountains when five small children vanished from their nursery school picnic. The heat was stifling that day, the tinkle of an ice-cream van in the air.... Three-and-a-half years later, in the dead of winter, the children are returned to their families...one by one. All except for Ivy - the granddaughter of Homicide Detective Kate Wakeland. The other four children say Ivy is dead.

Celebrating her forty-fifth birthday at her local pub, popular podcaster Alix Summer crosses paths with an unassuming woman called Josie Fair. Josie, it turns out, is also celebrating her forty-fifth birthday. They are, in fact, birthday twins. A few days later, Alix and Josie bump into each other again, this time outside Alix’s children’s school. Josie has been listening to Alix’s podcasts and thinks she might be an interesting subject for her series. She is, she tells Alix, on the cusp of great changes in her life.

In 1998, the American Jorgenson family had been on a year-long road trip in Australia. One humid, storming night, the mother - Elsa Jorgenson - vanished in an isolated stretch of Australian everglades. Elsa was never seen again. That night, twelve-year-old Lily Jorgenson was left alone and terrified in the family camper—even her teenage sister Iris is missing. When Iris comes racing back through the rain, she refuses to tell where she’s been. Lily is certain her sister is hiding a dark secret.

Evie is in the grip of a gambling addiction. She's terrified she'll destroy the lives of her husband and two small daughters, especially with her rising debt. She grabs onto a lifeline - the offer of a program that promises to heal addictions and give her a fresh start. Evie and 27 others from around the world travel to a monastery on a tiny Greek island to begin the program. There are six days and six challenges on the path to healing. Ten thousand dollars per challenge. Sixty thousand on completion. Enough to pay off debts and start anew.

Seven years ago, six-year-old Maisie Earnshaw was found facedown in a duck pond, her body mutilated. Isabel - at age 14, found covered in Maisie's blood - was convicted of murder. As Leah spends time with Isabel, she comes to know her as a young woman with a sweet, gentle nature, someone she could never see as a murderer. Leah begins to suspect members of the Fielding family of framing Isabel as a young girl, and she's not the only one. True crime blogger James Gorden thinks Isabel is innocent, too.

I only try on one of Nina’s pristine white dresses once. Just to see what it’s like. But she soon finds out...and by the time I realize my attic bedroom door only locks from the outside, it’s far too late. But I reassure myself: The Winchesters don’t know who I really am. They don’t know what I’m capable of....

Shelby Tebow is the first to go missing. Not long after, Meredith Dickey and her six-year-old daughter, Delilah, vanish just blocks away from where Shelby was last seen, striking fear into their once-peaceful community. Are these incidents connected? After an elusive search that yields more questions than answers, the case eventually goes cold. Now, 11 years later, Delilah shockingly returns. Everyone wants to know what happened to her, but no one is prepared for what they'll find....

Everyone from Wakarusa, Indiana, remembers the infamous case of January Jacobs, who was discovered in a ditch hours after her family awoke to find her gone. Margot Davies was six at the time, the same age as January—and they were next-door neighbors. In the twenty years since, Margot has grown up, moved away, and become a big-city journalist. But she’s always been haunted by the feeling that it could’ve been her. And the worst part is, January’s killer has never been brought to justice.

Kit Darling is a maid with a snooping problem. She’s the “invisible girl,” compelled to poke into her wealthy clients’ closely guarded lives. It’s a harmless hobby until Kit sees something she can’t unsee in the home of her brand-new clients: a secret so dark it could destroy the privileged couple expecting their first child. This makes Kit dangerous to the couple. In turn, it makes the couple—who might kill to keep their secret—dangerous to Kit.

Some places seem too beautiful to be touched by horror. Summit Lake, nestled in North Carolina’s Blue Ridge Mountains, is that kind of place. But two weeks ago, Becca Eckersley, a first-year law student and daughter of a powerful attorney, was brutally murdered there. Now the town is reeling with grief, and the police are baffled.

In the summer of 2006, Emma Price watched helplessly as her six-year-old son's red coat was fished out of the River Ouse. It was the tragic story of the year - a little boy, Aiden, wandered away from school during a terrible flood, fell into the river, and drowned. His body was never recovered. Ten years later Emma has finally rediscovered the joy in life...until Aiden returns.

When Aurelie Harcourt's father dies in debtor's prison, he leaves her just two things: his wealthy family, whom she has never met, and his famous pen name, Nathaniel Droll. Her new family greets her with apathy and even resentment. Only the quiet houseguest, Silas Rotherham, welcomes her company. When Aurelie decides to complete her father's unfinished serial novel, she must keep her identity as Nathaniel Droll hidden while searching for the truth about her mother's disappearance - and perhaps even her father's death.

When British twenty-somethings Ruth and Adam are offered the chance to spend the summer housesitting in New York, they can’t say no. Young, in love and on the cusp of professional success, they feel as if luck is finally on their side. So the moment that Eden turns up on the doorstep, drenched from a summer storm, it seems only right to share a bit of that good fortune. Beautiful and charismatic, Eden claims to be a friend of the homeowners, who told her she could stay whenever she was in New York. They know you’re not supposed to talk to strangers....

If Avery Chambers can’t fix you in 10 sessions, she won’t take you on as a client. Her successes are phenomenal—she helps people overcome everything from domineering parents to assault—and almost absorbs the emptiness she sometimes feels since her husband’s death. Marissa and Mathew Bishop seem like the golden couple—until Marissa cheats. She wants to repair things, both because she loves her husband and for the sake of their eight-year-old son. After a friend forwards an article about Avery, Marissa takes a chance on this maverick therapist.

It's a blindingly hot summer. International visitors surge into Sydney's Darling Harbour. Two-year-old Tommy is sailing his toy boat in the park there with his mother Phoebe. Tommy vanishes into thin air. The following winter, taunting notes written as nursery rhymes begin arriving at his parents' home. Little Boy Blue, where did you go? Who led you away? Only I know.

In 1998, the American Jorgenson family had been on a year-long road trip in Australia. One humid, storming night, the mother - Elsa Jorgenson - vanished in an isolated stretch of Australian everglades. Elsa was never seen again. That night, twelve-year-old Lily Jorgenson was left alone and terrified in the family camper—even her teenage sister Iris is missing. When Iris comes racing back through the rain, she refuses to tell where she’s been. Lily is certain her sister is hiding a dark secret.

Nicole Cutty and Megan McDonald are both high school seniors in the small town of Emerson Bay, North Carolina. When they disappear from a beach party one warm summer night, police launch a massive search. No clues are found, and hope is almost lost until Megan miraculously surfaces after escaping from a bunker deep in the woods. A year later the best-selling account of her ordeal has turned Megan from local hero to national celebrity.

Psychologist Margot Scott has a picture-perfect life: a nice house in the suburbs, a husband, two children and a successful career. On a warm spring morning Margot approaches one of her clients on a busy train platform. He is looking down at his phone, with his duffel bag in hand as the train approaches. That’s when she slams into his back and he falls in front of the train. Margot’s clients all lie to her, but one lie cost her family and freedom.

Avery Mason, host of American Events, knows the subjects that grab a TV audience’s attention. Her latest story - a murder mystery laced with kinky sex, tragedy, and betrayal - is guaranteed to be ratings gold. New DNA technology has allowed the New York medical examiner’s office to make its first successful identification of a 9/11 victim in years. The twist: The victim, Victoria Ford, had been accused of the gruesome murder of her married lover. In a chilling last phone call to her sister, Victoria begged her to prove her innocence.

College student Joe Talbert has the modest goal of completing a writing assignment for an English class. His task is to interview a stranger and write a brief biography of the person. With deadlines looming, Joe heads to a nearby nursing home to find a willing subject. There he meets Carl Iverson, and soon nothing in Joe's life is ever the same. Carl is a dying Vietnam veteran-and a convicted murderer. With only a few months to live, he has been medically paroled to a nursing home after spending thirty years in prison for the crimes of rape and murder.

It's been seven years since the Seattle Strangler terrorized the city. His victims were all young, pretty, their lifeless bodies found wrapped in a home-sewn white dress. But there was one who miraculously escaped death, just before the Strangler disappeared. Lara Church has only hazy memories of her long-ago attack. What she does have is a home in Austin, a job, and a chance at a normal life at last. Then Texas Ranger James Beck arrives on her doorstep with shattering news: The Strangler is back....

It has been eight years since Dr. David Beck’s wife, Elizabeth, was murdered by a serial killer. When Beck receives a message containing a phrase only Elizabeth should know, he is tormented to tears. Either someone is playing a sick joke, or the wife he’s never stopped loving is still alive. He’s been warned to tell no one, and as the desperation of his search for the truth intensifies, he heads straight toward a deadly secret.

Quinn Alexander has committed an unthinkable crime. To avoid spending her life in prison, Quinn makes a run for it. She leaves behind her home, her job, and her family. She grabs her passport and heads for the northern border before the police can discover what she's done. But when an unexpected snowstorm forces her off the road, Quinn must take refuge at the broken-down, isolated Baxter Motel. The handsome and kindly owner, Nick Baxter, is only too happy to offer her a cheap room for the night. Unfortunately, the Baxter Motel isn't the quiet safe haven it seemed to be.

Every year, Caroline Reed takes a trip with her best friend, Esme Lamont. They’re usually accompanied by their spouses - but this year, everything’s changed. Esme has just gone through a bitter divorce, and Caroline's wondering if her own marriage is reaching its breaking point as she and her husband, John, cope with the discovery that their son has been abusing drugs. Still, the inseparable duo books a weeklong stay at a beach-front home in Shoreham, Florida, inviting Esme’s brother, Nick, and his new husband. After a blissful first night in the vacation home, tragedy strikes.

Juliet only wanted to see her childhood home one more time–to look at it from the street. She never intended to meet the new owners, let alone talk her way into a position as their new live-in nanny. But it's too late now to tell the truth about who she really is. Six-year-old Kitty has progressive mutism and cannot speak. Nobody knows why she keeps making silent phone calls to the police. Juliet makes it her mission to find out. As Juliet settles into the house, nostalgia for her childhood gives way to uneasiness, as troubling memories surface.

When Nigel Baxter, a middle-aged married banker with an unremarkable past, is found dead in the bath of a plush hotel suite, his wrists slit, it looks as if he's taken his own life. At first. But when Detective Inspector Daniel Riley is assigned to the case, he soon realises all isn't as it first appears to be. When a postmortem shows Baxter was poisoned, Riley suspects foul play. And then there's the odd addition of a teddy bear left at the crime scene....

Wedding-dress designer Jenny Tate understands the happily ever after business, yet somehow she's still involved in her ex-husband's life. In fact Owen's new wife may - inexplicably - be Jenny's new best friend. Sensing this, well, relationship isn't helping her move on, Jenny trades the Manhattan skyline for her hometown up the Hudson, where she'll be able to bask in her sister Rachel's picture-perfect family life...and hopefully make one of her own.

Timothy and Jonah, wealthy entrepreneurs with a spoiled son, hide sins from their past—one involving a death on a cruise, the other a crime in Bali. Nathan and Samantha, the hot ex-nanny turned trophy wife, grapple with infertility and a shocking paternity secret. Bartosz and Angelika (he’s a chef, she’s a former sex worker) carry debts to the other couples they don’t even realize they owe. Over fourteen days, the couples bond—but their pasts are too deeply intertwined to stay hidden. The sly concierge, Putu, knows more than he lets on.

It’s the moment single-mum Kate has been dreading. With her only daughter, Chloe, about to leave home, she’s terrified by the prospect of an empty nest. That is until she meets charming lawyer Adam. He could be the perfect catch - if it wasn’t for his clingy son. Because Ben has a crush on Chloe. A crush that is fast becoming an obsession. Flattered by the attention, Chloe is happy to string him along - for now at least. But Kate can see the danger signs, even if her daughter can't.