In the former mining town of Black Lake, there is an old story about a shipwreck with only one survivor. His descendants have a unique ability: once in their lives – and only once – they can unwind the events of the previous six hours.

More than two hundred years later, part-time police constable Ella Manning is attending a party at Black Lake Manor, the cliff-top mansion belonging to the local billionaire. When a raging storm sweeps in from the Pacific, she and several other guests find themselves trapped.

And when their host is discovered brutally murdered in his study the next morning, the door locked from the inside, they turn to her to solve the crime.

Pushing her detective skills to the limit, against the odds Ella is sure she has identified the killer – but then someone undoes time. With no memory of what she discovered before, her investigation begins again, with very different results. Which of her suspects is guilty? And is there something even more sinister she is yet to uncover?

Can she solve the mystery before time runs out again?

“As with his debut offering last year, the excellent Five Minds, Morpuss overlays sci-fi concepts on the conventions of vintage crime fiction.”

Financial Times – Best New SF

“An intriguing take on a Agatha Christie-type locked-room mystery.”

Irish Independent

“Original and hugely addictive, this locked room mystery will have you turning the pages.”

BA Paris, author of Behind Closed Doors

“Incredible. A delicious, sophisticated puzzle you’ll want to take your time to solve.”

Janice Hallett, author of The Appeal

“Guy Morpuss is quickly establishing himself as a key player in the speculative fiction genre. A very clever and brilliantly imagined locked room mystery that will not disappoint fans of Five Minds.”

Victoria Selman, author of Truly, Darkly, Deeply

“An endlessly inventive murder mystery – gripping from the first page.”

Alex Pavesi, author of Eight Detectives

“A dizzyingly brilliant locked-room mystery that had me gripped from the start. If you like your crime stories to dazzle with unique settings, genius plotting, great characterisation and sublime speculative twists, this is the book for you!”

Philippa East, author of Little White Lies

“Mind blown. A super clever time travelling, heart eating thriller.”

Tina Baker, author of Call Me Mummy

“Staggering ingenuity. A refreshingly original locked room mystery.”

David Jackson, author of The Rule

“A deeply unique experience. I love it.”

Matt Wesolowski, author of Six Stories

“A thrillingly ingenious locked room mystery.”

Kate Griffin, author of Kitty Peck and the Music Hall Murders

“A time-bending labyrinth of a mystery that will keep you guessing to the very end, with deliciously dark speculative notes woven in. If you like locked-room reads which are intense and intricately plotted, then this is the book for you. Brilliant.”

Eve Smith, author of The Waiting Rooms

“Mind-bendingly good.”

Robert Scragg, author of The End of The Line

“A mind-bendingly brilliant read that reinvents the locked room mystery. Imagine Agatha Christie on speculative steroids. I loved it!”

Tim Glister, author of Red Corona

“Turning back time is twist heaven! Great fun, and a brain workout for all of my five minds.”

Leonora Nattrass, author of Black Drop

“Immersive worlds, wildly ingenious plots, and thrilling blood-soaked mysteries. Smart, innovative, original. One of my favourite reads so far this year!”

Dan Malakin, author of The Box

“So, so good, and clever, so clever.”

James Mylet, author of The Homes

“A jaw dropping workout for the mind. Absolute magic, and effervescent writing.”

Kate Simants, author of A Ruined Girl