Ten years ago, deeply in love, I would have done anything for Thomas Kirkwood. But on the night of our graduation, fuelled by drink and drugs, Thomas’s lifeless body was found floating in the Kirkwood family lake. That weekend changed everything, and I swore I would never return to Kirkwood manor. Now, ten years later, I have been invited back to the place that holds such terrible memories for me, to a memorial weekend for Thomas, organised by his still-grieving mother Ada. But this is no ordinary weekend. This is a reunion to catch a killer.

Lexi Jakes thought she could run from her past. But when her biological mother is found dead, strangled with a red silk scarf and holding a chess piece, Lexi knows that her worst nightmare has come true. Because the murder has all the hallmarks of her own serial killer father, renown strangler Peter Graves. Now with her own precious daughter’s life in danger, Lexi will do anything to keep her child safe...she is the serial killer's girl after all.

When I first walked into Jake and Megan’s immaculate home, I felt totally at ease. Sitting in the crisp white living room, they held hands and talked lovingly about their baby girl, Fern. As the weeks passed, I began to think I’d made a mistake in taking the job. Jake was overly friendly from the start, watching my every move and always offering to drop me home, even though it was out of his way. And Megan seemed to take pleasure in telling me off in front of her husband, blaming me for things I hadn’t done.

When Ellie tells me she has a new boyfriend, I am absolutely thrilled and can’t wait to meet him. She finally seems so happy and in love. But there’s a catch. Ellie has never met him in person. In fact, he doesn’t even live in the same country. Our home is in England, but Daryl is in Los Angeles.

I’ve been on edge the whole time because 15 years ago when we were living in this city my husband Jack did something that ripped our lives apart. I swore I would never come back here, but Jack insisted. One afternoon, in the blur of a crowd, I lose sight of my son. I can’t find him anywhere. Frantic, I call my husband. But what he tells me next shakes me to the core....

I open the creaking oak front door of my beautiful country house to see a stranger on my doorstep. The woman is stunning with glossy red hair and flawless make up. "Can I help you?" I ask. That was my first mistake. Alexis tells me she is a distant relative and shows me a DNA match on her phone. She has no family and would love to get to know us. My husband Hugh invites her in to join our dinner party. As we drink wine, she opens up about her sad childhood. Her amber eyes are mesmerizing, and I can see my husband is being drawn in by her story. Then she asks for our help.

Alice and Seth are a perfect love story: the handsome doctor and his beautiful fiancée. They’re wealthy, well liked and made for each other—the envy of all their friends. Alice can’t wait for the day of their dream wedding. But when she arrives at the altar, she doesn’t recognise the man waiting to marry her. When this stranger insists he’s Seth, her husband-to-be, the entire congregation seems to agree. Even her parents try to persuade Alice to go through with the wedding.

Amanda is a hardworking single mum, completely focused on her job and her daughter, Louise. She’s been saving for years, and now, finally, she can afford to give up work and chase her dream. But then, on her commute home from London to Brighton, she meets a charming stranger - who seems to know everything about her. He delivers an ultimatum. She needs to give him the code for the safe where she keeps her savings before the train reaches Brighton - or she’ll never see Louise again.

Our new home was meant to be a chance for us to start again; to make new friends and forget the past. And as I look around the barbeque we’ve thrown for our neighbors, I dare to dream that things will be all right. I watch my husband joking as he flips burgers and my daughter turning cartwheels on our sun-bleached lawn. And then my gaze falls on my son, Jacob, and his new girlfriend, Rose, in her light blue jeans and her green crop top. There is a worried expression clouding her beautiful eyes.... The next day I get a call from Rose’s mother that chills me to the bone.

Moving to Prospect Close has been everything I’d hoped for. In the city, Oliver and I barely saw each other, irritable at home and rushing around after the kids. But here, the neighbors have been so friendly and welcoming, and we’re now at barbeques and playdates every weekend, all together, as a family. It’s the type of life I always dreamed of. One that’s a million miles from...before. Not that Oliver would know anything about that.