"This book will haunt me for a long time—in the very best way." —Amy McCulloch, author of Breathless Beware what waits in the shadows… With one unexpected email from her estranged best friend, Lucy, Mina Murray’s carefully curated life is turned upside down. Leaving behind her psychiatric practice in London, she returns home to the windswept shores of Wales. Faced with everything she’s left behind, she soon discovers that Lucy’s symptoms mirror those of Mina's mysterious amnesi