Bring out your popcorn boxes and favorite refreshments! Cancel your entire schedule, camp out on your cozy couch, and wrap yourself into a human burrito with the softest, fluffiest blanket you own—because once you open this book, you won’t be able to put it down. Get ready to dive into a locked-room mystery that’s smart, layered, and overflowing with tension. It’s a puzzle box of secrets stacked inside even more secrets, filled with "wait—what?!" moments, creepy surprises, and a brilliant guessing game that dares you to figure out who the real threat is before the last page.
I’ve always been a sucker for stories where a group of people is trapped in a single setting and forced to spill their darkest secrets, especially when the stakes are high and the secrets are deadly. Mark Edwards masterfully takes this setup and cranks it up with dual timelines, psychological suspense, and enough red herrings to keep you dizzy. The tension never lets up, and the pacing is near-perfect, gradually tightening the noose around each character until there’s no escape—literally and emotionally.
The story centers around six friends who, back in 1999, were university students working on a dating app with their charismatic psychology professor, Sebastian Marlowe. The project took a dark turn when they combined the app with a controversial psychopathy test—and then something so disturbing happened that Sebastian abruptly ended the whole thing. Twenty-five years later, the group—now mostly estranged—receives an invitation from Georgina and Theo, the power couple who ran with the idea and built a tech empire, to attend a dinner party in honor of Sebastian, who has recently passed away.
Each of the old friends comes with baggage:
Will, a failed writer now teaching and still haunted by what could have been.
Sophie, Will’s former flame, who inherited a quiet life from her grandmother but feels aimless.
Rohan, now married with kids, is battling financial struggles and hoping for a bailout from Theo.
Lily, the brilliant mind of the group, recently divorced with two children, is working on a top-secret tech innovation that could change everything.
Georgina and Theo seem successful and picture-perfect, but beneath the surface lies a gut-wrenching family tragedy that’s already fraying their bond. And then there’s Fin, a mysterious man who claims to have worked with Sebastian. His presence raises eyebrows—especially for Will, who notices Fin behaving oddly, almost too comfortably with the catering staff. He whispers with them, seems to know more than he lets on, and gives off a distinct vibe that something deeper is going on.
And then—bam! The doors are locked. Cell reception disappears. Strange voices echo through empty rooms. A chilling realization sets in: they are trapped. Not by accident, but by design. One of them holds a terrible secret from 1999—something that’s been buried too long. Until it's confessed, they cannot leave.
As tensions rise, friendships unravel, and paranoia kicks in, it becomes clear that someone among them is not who they seem. The group must reckon with the truth they’ve all been avoiding, but only one of them is keeping the most damning, life-altering secret—and that secret is the key to their survival.
The final reveal is a total knockout. Just when you think you’ve figured it all out, the rug gets pulled from under you in the best way possible. The ending is clever, satisfying, and darkly poetic, tying the mystery together in a way that lingers after the last page.
Overall, this book is an adrenaline-fueled rollercoaster of suspense, packed with clever clues, deep character work, and nonstop thrills. It’s fun, eerie, and completely addictive—the kind of story you’ll want to finish in one breathless sitting. I absolutely loved it and am happy to give it five locked-room stars!
A very huge thanks to NetGalley and Atria Books for providing this thrilling mystery’s digital reviewer copy in exchange for my honest thoughts. I truly appreciate the opportunity!