Leah and McKenna have never met, though they have parallel lives. They don’t—ever—find themselves in the same train carriage or meet accidentally at the gym or the coffee shop. They don’t—ever—discuss their problems and find common ground. They don’t—ever—acknowledge to each other that although their lives have all the trappings of success, wealth and happiness, they are, in fact, trapped.

As the third wave of the virus hits, all inhabitants of Melbourne are given until 8pm to get to their homes. Wherever they are when the curfew hits, they must live for four weeks and stay within a 5km radius. When Lou’s son Samuel doesn’t arrive home by nightfall she begins to panic. He doesn’t answer his phone. He doesn’t message. His social media channels are inactive. Lou is out of her mind with worry, but she can’t go to the police, because she has secrets of her own. Secrets that Samuel just can’t find out about. Lou must find her son herself and bring him home.

1949: During the coldest winter Seattle has seen in decades, pregnant sixteen-year-old Brigid Ryan arrives at Fairmile, a home for “fallen women” run by the Catholic Church on a remote island in Puget Sound. She and her baby will disappear before the snow melts.

Lowen Ashleigh is a struggling writer on the brink of financial ruin when she accepts the job offer of a lifetime. Jeremy Crawford, husband of best-selling author Verity Crawford, has hired Lowen to complete the remaining books in a successful series his injured wife is unable to finish. Lowen arrives at the Crawford home, ready to sort through years of Verity's notes and outlines, hoping to find enough material to get her started. What Lowen doesn't expect to uncover in the chaotic office is an unfinished autobiography Verity never intended for anyone to read.

Carson Chow is a high functioning addict. For years, he's been able to meet the increasing demands from his aging immigrant parents while hiding his crystal meth use every other weekend. One Friday night, as he's passed out from a drug binge, he misses 38 phone calls from his father, detailing first the collapse and eventually the death of his mother. Carson has always been close to his mother. He throws himself into the preparation of his mother's funeral. Will this tragedy plunge him deeper into his abuse or finally rouse him from his addiction stupor?

For most of the last hundred years, Biloxi was known for its beaches, resorts, and seafood industry. But it had a darker side. It was also notorious for corruption and vice, everything from gambling, prostitution, bootleg liquor, and drugs to contract killings. The vice was controlled by small cabal of mobsters, many of them rumored to be members of the Dixie Mafia.

Every day without fail, Travis Devine puts on a cheap suit, grabs his faux-leather briefcase, and boards the 6:20 commuter train to Manhattan, where he works as an entry-level analyst at the city’s most prestigious investment firm. In the mornings, he gazes out the train window at the lavish homes of the uberwealthy, dreaming about joining their ranks. In the evenings, he listens to the fiscal news on his phone, already preparing for the next grueling day in the cutthroat realm of finance. Then one morning Devine’s tedious routine is shattered by an anonymous email: She is dead.

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.

Minnie Cooper knows two things with certainty: that her New Year's birthday is unlucky, and that it's all because of Quinn Hamilton, a man she's never met. Their mothers gave birth to them at the same hospital just after midnight on New Year's Day, but Quinn was given the cash prize for being the first baby born in London in 1990 - and the name Minnie was meant to have, as well. With luck like that, it's no wonder each of her birthdays has been more of a disaster than the one before.

Nell Sweeney has led an ordinary life. Every day, she walks to and from the hospital where she works as a nurse, believing that no harm can befall her. Until one day she is taken. Because someone out there has a secret. Someone out there has been watching Nell—and they’ve been watching others like her, too. Nell is the unlucky one—she was in the wrong place at the wrong time. And if she isn’t found soon, someone will make sure that she isn’t the last woman to be taken.

In seven days, Maggie’s son, Max, turns three. But she’s not planning a party or buying presents or updating his baby book. She’s dreading it. Because in her world, third birthdays are the days on which the unthinkable happens...she loses her child. For the last 12 years Maggie has been imprisoned in a basement. Abducted aged 15, she gave birth to two sons before Max, and on their third birthdays her captor came and took them from her. She cannot let it happen again. But she has no idea how to stop it. And the clock is ticking....

All Andrew wants is to be normal. That's why his coworkers believe he has the perfect wife and two children waiting at home for him after a long day. But the truth is, his life isn't exactly as people think...and his little white lie is about to catch up with him. Because in all of Andrew's efforts to fit in, he's forgotten one important thing: how to really live. And maybe, it's finally time for him to start.

Paul Henderson leads a normal life. A deputy headteacher at a good school, a loving relationship with girlfriend Jenna and a baby on the way. Everything seems perfect. Until Paul receives a message from his ex-fiancé, Nicole. Beautiful, ambitious and fierce, Nicole is everything Jenna is not. Now it seems Nicole is back, and she has a score to settle. But Paul can’t understand how Nicole is back. Because he’s pretty sure he killed her with his own bare hands. Which means someone else knows the truth about what happened that night. And they’ll stop at nothing to make Paul pay.

It’s fair to say that Maddie’s life in London is far from rewarding. With a mother who spends most of her time in Ghana (yet still somehow manages to be overbearing), Maddie is the primary caretaker for her father, who suffers from advanced stage Parkinson’s. At work, her boss is a nightmare and Maddie is tired of always being the only Black person in every meeting.

One mother's past could cost her everything. Frankie Keegan is struggling. While she tries to make strides in her career, life at home is slowly unravelling as she is haunted by the secrets of her past. Someone else remembers. As the dark nights draw in, the anniversary of the loss of her brother looms, and Frankie is drawn back to the memories of that fateful night 20 years previously. As she descends into a guilt-ridden state, she begins to suspect that someone else is also remembering that night and they are determined to terrify her.