Our universe is ruled by physics, and faster-than-light travel is not possible - until the discovery of The Flow, an extradimensional field we can access at certain points in space-time that transports us to other worlds, around other stars. Humanity flows away from Earth, into space, and in time forgets our home world and creates a new empire, the Interdependency, whose ethos requires that no one human outpost can survive without the others. It's a hedge against interstellar war - and a system of control for the rulers of the empire.

When Bethany's lover is brutally murdered, she has to hide her grief from everyone. But someone knows her secret. And then one day the threats begin. With an ever-growing pile of evidence pointing to her as the murderer, the only way she can protect her secrets is to prove her innocence. And that means tracking down a killer.

Lynn Naismith gave up the job she loved when she married Ed, the love of her life, but it was worth it for the happy years they enjoyed together. Now, 10 years on, Ed has been diagnosed with early onset dementia, and things start to happen - things more sinister than missing keys and lost words. As some memories are forgotten, others, long buried, begin to surface...and Lynn’s perfect world begins to crumble. But is it Ed’s mind playing tricks, or hers....?

It was meant to be Caitlin's perfect summer, but betrayed by her best friend and her boyfriend, she finds herself hitchhiking home alone, heartbroken, and penniless. When a smiling family pulls up on the roadside to help her on her way, she's relieved at first - they seem friendly, normal. And when they offer her a warm bed in their cottage for the night, she's grateful - it's not safe for young women travelling alone in the dark, and she's in no rush to get home, where she knows a grave secret is due to blow her family apart.

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.

When Abbie Adams, a historian-turned-journalist, is hired to investigate a cold-case murder from 1969, she jumps at the chance. But soon after she begins researching the case, she realizes that Frank Wexler, the faculty advisor who tanked her thesis and a member of a powerful family in town, is connected to the crime and is definitely not talking. As Abbie tracks down the remaining living witnesses, she slowly pieces together the events of that fateful night, and yet is not a single step closer to solving the case. Were the police back then told to stand down? To cover up the crime?

Ex-journalist Violet Brewster is keen to make a good first impression in her new community, having just moved to the small village of Merrywell. When Violet hears about the mystery of Helen Slingsby, who disappeared from the village forty years earlier, she decides to help uncover what happened. But despite Violet’s best efforts, she can find no trace of the missing woman.

The perfect husband...After a difficult pregnancy, Esther is grateful that her forward-thinking husband, Robin, offers to put his career on hold so that she can return to the job she loves. The perfect father...Robin flourishes in his new role of stay-at-home parent, but Esther finds leaving her daughter behind to go to work more challenging than she'd thought, and soon the imbalance in their relationship brings old tensions to the surface. A perfect lie? Then one day Esther arrives home from work to find Robin and Riley are missing.

Cameron and Lisa Murdoch are successful crime-writers. They have been on the promotional circuit, joking that no one knows how to get away with crime like they do. After all, they write about it for a living. So when their 7 year old son Zach goes missing, naturally the police and the public wonder if they have finally decided to prove what they have been saying all this time - are they trying to show how they can commit the perfect crime?

Bo Luxton has it all - a loving family, a beautiful home in the Lake District and a clutch of best-selling books to her name. Enter Alice Dark, an aspiring writer who is drifting through life, with a series of dead-end jobs and a freeloading boyfriend. When they meet at a writers' retreat, the chemistry is instant, and a sinister relationship develops.... Or does it?

When young, beautiful Cassie Jensen arrives unconscious to the intensive care ward at St. Catherine's hospital after being struck in a hit-and-run while out walking her dog, chief nurse Alice Marlowe thinks she looks familiar. She starts digging deeper into Cassie's relationships, only to discover something about her patient that she'd been keeping secret from everyone, including her devoted husband and family.

Every Friday Mercy Hamilton goes to the same supermarket. She doesn’t go to buy groceries, instead, she shows a fading photo of a little girl to anyone who’ll look – begging for help to find her daughter. One Friday, Erica Fielding comes across Mercy, and touched by her story, Erica agrees to help. As Erica is drawn deeper and deeper into Mercy’s life, she discovers there is no record of Mercy’s daughter. In fact, there’s no record of a child at all. But who is the girl in the photo if not Mercy’s missing daughter? And what danger will Erica find herself in by pursuing the truth?

When young London professional Alex Evans is informed that his sister's body has been pulled from an icy lake in Northern Lapland, he assumes his irresponsible sister accidentally drowned. He travels to the wealthy winter resort where Vicky worked as a tour guide and meets Agatha Koskinen, the detective in charge. Agatha is a no-nonsense single mother of three who already thinks there's more to Vicky's case than meets the eye. As the two form an unlikely alliance, Alex also begins to suspect the small town where his sister lived and died is harbouring secrets.

Three years ago, DCI Laura Hart was the top hostage and crisis negotiator for the Greater Manchester Police. Then her husband was kidnapped. Despite her best efforts to reason with the criminals, he was brutally murdered. Now living on the Isle of Anglesey in Wales, Laura is slowly healing. Then she gets a call: armed drug dealers have seized a tourist boat—and her 10-year-old son Jake is on board. There’s no other negotiator available, and the police need her to step up.

Burned out and traumatised by her horrifying experiences around the world, aid worker Úrsula has returned to Iceland. Unable to settle, she accepts a high-profile government role. But on her first day in the post, Úrsula promises to help a mother seeking justice for her daughter, who had been raped by a policeman. A homeless man is stalking her – but is he hounding her, or warning her of some danger? And why has the death of her father in police custody so many years earlier reared its head again?