A time travel murder mystery, set in a female-centric alternate world. A time travel murder mystery from a brilliantly original new voice. 'Genre-defying ... Witty and inventive' Guardian . 1967 Four female scientists invent a time travel machine. But then one of them suffers a breakdown and puts the whole project in peril... 2017 Ruby knows her Granny Bee was the scientist who went mad, but they never talk about it. Until they receive a message from the future, warning of an elderly woman's violent death... 2018 Odette found the dead women at work – shot in the head, door bolted from the inside. Now she can't get her out of her mind. Who was she? And why is everyone determined to cover up her murder? 'Intriguing and multi-layered' Daily Mail . 'Captivating, delightful and thorougly original' Jenny Melamed. 'Troubling and inspiring, comforting and horrifying' SciFiNow .