On still nights, when the curve of a winter moon is smudged in the flow of the River Quaggy, the dead clamor for him. And sometimes he coaxes the living to join them. To other people, his victims might be mere medical oddities. To him, they are fascinating specimens, worthy of display. Above all, he is a collector, eager for recognition even as he hides in the shadows. Detective Sergeant Etta Fitzroy is the first to recognize the connection between the disappearance of a young girl and a cold case that almost cost her the career she's sacrificed so much for.

Gifted musician Clemency Thompson is playing for tourists on the streets of Southern France when she receives an urgent text message. Her childhood friend, Lucy, is demanding her immediate return to London. It’s happening, says the message. The baby is back. Libby Jones was only six months old when she became an orphan. Now 25, she’s astounded to learn of an inheritance that will change her life. A gorgeous, dilapidated townhouse in one of London’s poshest neighborhoods has been held in a trust for her all these years. Now, it’s hers.

Medical student Amy Brenner is spending the night on a locked psychiatric ward. Amy has been dreading her evening working on Ward D, the hospital’s inpatient mental health unit. There are very specific reasons why she never wanted to do this required overnight rotation. Reasons nobody can ever find out. And as the hours tick by, Amy grows increasingly convinced something terrible is happening within these tightly secured walls.

Mia and Finn are busy turning a derelict house into their dream home when Mia unexpectedly falls pregnant. But just when they think the house is ready, Mia discovers a shocking message scored into a skirting board: I WILL SAVE THEM FROM THE ATTIC. Following the clue up into the eaves, the couple make a gruesome discovery: their home was once a real-life murder house, with the evidence still concealed within the four walls.

Fifteen-year-old Ellie Mack was the perfect daughter. She was beloved by her parents, friends, and teachers. She and her boyfriend made a teenage golden couple. She was days away from an idyllic summer vacation, with her whole life ahead of her. And then she was gone. Now her mother, Laurel Mack, is trying to put her life back together.

Amelie has always been a survivor, from losing her parents as a child in Paris to making it on her own in London. As she builds a life for herself, she is swept up into a glamorous lifestyle where she married the handsome billionaire Ned Hawthorne. But then, Amelie wakes up in a pitch-black room, not knowing where she is. Why has she been taken? Who are her mysterious captors? And why does she soon feel safer here, imprisoned, than she had begun to feel with her husband Ned?

Owen Pick’s life is falling apart. In his 30s and living in his aunt’s spare bedroom, he has just been suspended from his job as a teacher after accusations of sexual misconduct - accusations he strongly denies. Searching for professional advice online, he is inadvertently sucked into the dark world of incel forums, where he meets a charismatic and mysterious figure. Across the street from Owen lives the Fours family, headed by mom Cate, a physiotherapist, and dad Roan, a child psychologist. But the Fours family have a bad feeling about their neighbor Owen.

When a young man is found gruesomely murdered in a London houseboat, it triggers questions about three women who knew him. Laura is the troubled one-night-stand last seen in the victim’s home. Carla is his grief-stricken aunt, already mourning the recent death of yet another family member. And Miriam is the nosy neighbor clearly keeping secrets from the police. Three women with separate connections to the victim. Three women who are – for different reasons – simmering with resentment. Who are, whether they know it or not, burning to right the wrongs done to them.

Over the course of a long, hot summer in London, the lives of three very different married couples collide when their children join the same tutoring circle, resulting in illicit relationships, shocking violence, and unimaginable fallout. There’s Eve, a bougie earth mother with a well-stocked trust fund; she has three little ones, a blue-collar husband, and is obsessed with her Instagrammable recipes and lifestyle.

Ava only left her daughter in the pushchair for five minutes. The buckle was fastened, and she was sure it was safe. But when she came downstairs, the door was open and Abi was gone - she walked down the road, past the Lovegoods' house, and was never seen again. A year later, the Lovegoods throw a housewarming party, showing off the results of their renovation. Ava doesn’t want to go. She can’t bear to look down that end of the road, to see the place where Abi vanished, and she doesn’t want to spend time with people who don’t share her grief.

Raised in a quiet rural community, Anna has always been taught that her mamma’s rules are the only path to follow. But, on her 18th birthday, she defies her mamma for the first time in her life and goes to Astroland. She’s never been allowed to visit Florida’s biggest theme park, so why, when she arrives, does everything about it seem so familiar? And is there a connection to the mysterious letter she receives that same day - a letter addressing her by a different name?

Sara Keane's husband, Damien, has uprooted them from England and moved them to his native Northern Ireland for a "fresh start" in the wake of her nervous breakdown. But three sleepless nights into their new life, Sara understands it's not an entirely fresh start after all: Damien's new boss is his ex-con father, whose contracting business is run with violence and tinged by paramilitary association. Sara, who knows no one in Northern Ireland, is jobless, carless, friendless - all but a prisoner in her own house.

Eva Hansen wakes in the hospital after being struck by lightning and discovers her mother, Kat, has been murdered. Eva was found unconscious down the street. She can’t remember what happened, but the police are highly suspicious of her. Determined to clear her name, Eva heads from Seattle to London - Kat’s former home - for answers. But as she unravels her mother’s carefully held secrets, Eva soon realizes that someone doesn’t want her to know the truth. And with violent memories beginning to emerge, Eva doesn’t know who to trust. Least of all herself.

Leah’s perfect marriage isn’t what it seems, but the biggest lie of all is that she’s learned to live with what happened all those years ago. Marie drinks a bit too much to help her forget. And Carly has never forgiven herself for not keeping them safe.

When Sylvie Durand receives a letter calling her back to her crumbling family home in the South of France, she knows she has to go. In the middle of a sweltering 1990s summer marked by unusual fires across the countryside, she returns to La Reverie with her youngest daughter, Emma, in tow. As memories of the events that shattered their family a decade earlier threaten to come to the surface, Sylvie struggles to shield Emma from the truth of what really happened all those years ago. In every corner of the house, Sylvie can't escape the specter of Elodie, her first child.