The history-bending speculative novel longlisted for BEST NOVEL by the British Science Fiction Association.An impossible death: Detective Ethan Krol has been called to the scene of a baffling murder: a man and his son, who appear to have been drowned in sea-water. But the nearest ocean is a thousand miles away.An improbable story: Hollie Rogers doesn't want to ask too many questions of her new friend, Abi Eniola. Abi claims to be an ordinary woman from Nigeria, but her high-tech gadgets and extraordinary physical abilities suggest she's not telling the whole truth.An incredible quest: As Ethan's investigation begins to point towards Abi, Hollie's fears mount. For Abi is very much not who she seems. And it won't be long before Ethan and Hollie find themselves playing a part in a story that spans cultures, continents . . . and centuries.An extraordinary speculative thriller about the scars left by the Atlantic slave-trade, by a master of the genre.