Crookedwood, quiet Irish midlands town, place of secrets, past and present. Sarah left it behind years ago for life in the city, where she's now a rising star of the Dublin culinary scene. She's home to help her mother sell the family farm. One evening, while out walking in the nearby woods, Sarah is chased by a man and his vicious dog, narrowly escaping injury. In the days to follow—as painful memories resurface of another dark night in the woods years before—further unsettling events unfold, and Sarah becomes convinced that she is under threat.

She arrived into Heathrow after a difficult week at work. Her bag had been stolen. Her whole life was in there - passport, wallet, house key. When she tried to report the theft, she couldn't remember her own name. All she knew was her own address. Now she is at the door of Tony and Laura, a young couple living in Wiltshire. She says she lives in their home. They say they have never met her before. One of them is lying. But which one?

You see the people you work with every day, but what can't you see? Amira, Sarah, Paula, Ewan and Charlie have worked together for years - they know how each other likes their coffee, whose love life is a mess, whose children keep them up at night. But their comfortable routine life is suddenly shattered when an aggressive new boss walks in.... Now there's something chilling in the air. Who secretly hates everyone? Who is tortured by their past? Who is capable of murder?

Thomas Brogan is a serial killer. With a trail of bodies in his wake and the police hot on his heels, it seems like Thomas has nowhere left to hide. That is until he breaks into an abandoned house at the end of a terrace on a quiet street. And when he climbs up into the loft, he realises that he can drop down into all the other houses through the shared attic space. 

It all happens so quickly. One day you're living the dream, commuting to work by riverbus with your charismatic neighbour Kit in the seat beside you. The next, Kit hasn't turned up for the boat and his wife, Melia, has reported him missing. When you get off at your stop, the police are waiting. Another passenger saw you and Kit arguing on the boat home the night before, and the police say that you had a reason to want him dead. You protest. You and Kit are friends - ask Melia, she'll vouch for you.

She’s a murderer. Everyone knows she killed Stuart Rees - why else would his dead body be found in her shed? So now Tabitha is in prison, awaiting trial. Coming back to the remote coastal village where she grew up was a mistake. She didn’t fit in then, and she doesn’t fit in now. That day is such a blur, she can’t remember clearly what happened. There is something she is missing, something important. She only knows one thing.  

Louise has had to watch her husband, Andrew, start a new family in the four years since he left her. The ‘other woman’ is now his wife - but Louise isn’t ready to let Caz enjoy the life that was once hers or to let go of the man she still loves. As Louise starts to dig into Caz’s past, the two women’s pretence of civility starts to slip. But in trying to undermine each other, they discover more about the man they both married. And when Andrew is murdered at a family party, both women are found standing over the body. It’s always the wife. But which one?

2017: 19-year-old Tallulah is going out on a date, leaving her baby with her mother, Kim. Kim watches her daughter leave and, as late evening turns into night, which turns into early morning, she waits for her return. And waits. The next morning, Kim phones Tallulah's friends, who tell her that Tallulah was last seen heading to a party at a house in the nearby woods called Dark Place. 

Esme is a start-up success who runs her own successful media company and heads up a series of investigative podcasts. She also has a beautiful home, where she lives with her sister, Michelle, and her son, Zachary. Sure, there’s an ex-husband hanging around - Owen likes to pop round a bit too often - but everything is civilised and amicable. She has life all tied up. But Esme knows that any successful podcaster is only as good as her last story, so she sets out on a new series of interviews to get to the truth behind Simone Fischer’s high-profile murder of her husband. 

When Beth was 10, her beautiful, wild mother, Alice, disappeared. Beth’s life since hasn’t always been easy, but now she's settled, with a successful career, a loving family and a beautiful home. Then one day, there’s a knock at the door. Alice has returned. Desperate to rebuild their relationship, Beth invites her mother to move in. At first, everything is wonderful. But then Beth’s friends start to drift away, strange things happen at home and rumours about Beth begin to circle. Someone is out to destroy Beth’s newfound happiness. But who? And how far will they go?

Pete Riley is a stay-at-home dad; his partner, Maddie, works in advertising. After Pete drops two-year-old Theo off at nursery one morning, he's politely accosted by a man who looks just like Theo. The man, Miles Lambert, breaks the devastating news that Theo is in fact not Pete's son, but his - the two babies got mixed up at hospital and Miles and his wife, Lucy, now have the Rileys' son at home. They've already carried out DNA testing to prove it.

What was my sister doing standing over Florence’s cot in the middle of the night?I trust my sister, Carrie, with my daughter’s life. But then she’s accused of a terrible crime. Carrie lives under our roof, she pushes my daughter on the swings, she takes her out for ice cream. You might ask, why do I let her? Why would I risk my darling baby? How could I let my sister stay? Because I have a dangerous secret too. One that only Carrie knows about. And if that secret gets out, I could lose my little girl....

Elodie Fray wants to be more like her perfect sister, Ada, the one her parents are actually proud of. When she decided to quit her job and pursue her dream of becoming an author, she thought it would be her time to shine, but a year on nothing has happened. And she's getting desperate. When Elodie makes one small mistake on a drunken night with a friend, things quickly spiral and suddenly everyone believes she has a book deal. Unable to find a way back from her little lie, her perfect dream becomes a perfect nightmare - and desperate times call for desperate measures.

Marissa Irvine arrives at 14 Tudor Grove, expecting to pick up her young son Milo from his first playdate with a boy at his new school. But the woman who answers the door isn't a mother she recognises. She isn't the nanny. She doesn't have Milo. And so begins every parent's worst nightmare. As news of the disappearance filters through the quiet Dublin suburb and an unexpected suspect is named, whispers start to spread about the women most closely connected to the shocking event. Because only one of them may have taken Milo - but they could all be blamed.

Fran finds her standing by the swings. A little girl, Esther, no older than seven years old, by herself in the dead of night, her pretty but old-fashioned yellow dress covered in grass stains and her hair dishevelled. She says she's waiting for Father, and that strikes Fran as particularly odd. After Esther is reunited with her family, Fran can't stop thinking about this pious child whose imaginary friend is God. Fran's instincts tell her something is very wrong. Why does Esther keep running away from home, and how did she get that bruise on her leg?