An abandoned house... June 1933, and sixteen-year-old Alice Edevane is preparing for her family's Midsummer Eve party at their country home, Loeanneth. But by the time midnight strikes and fireworks light up the night skies, the Edevane family will have suffered a loss so great that they leave Loeanneth forever. A missing child... Seventy years later, after a particularly troubling case, Detective Sadie Sparrow retreats to her beloved grandfather's cottage in Cornwall. Once there, she stumbles upon an abandoned house, and learns the story of a baby boy who disappeared without a trace. An unsolved mystery... Meanwhile, in her elegant Hampstead home, the formidable Alice Edevane, now an old lady, leads a life as neatly plotted as the bestselling detective novels she writes. Until a young police detective starts asking questions about her family's past, seeking to resurrect the complex tangle of secrets Alice has spent her life trying to escape...