From the bestselling author of The Unadoptables, comes a stunning new story about a missing friend, a gothic city, and a secret society full of wonder, invention and maybe a hint of magic. Ema Vašková has always felt different. In a family of famous scientists, there's not much room for superstition or omens—it doesn't help that she appears to predict events before they happen, and has a peculiar fear of shadows... But then she meets Silvie—a girl who finally sees Ema for the extraordinary person that she is. Soon the girls are meeting for secret midnight adventures, and facing Ema's fears together. But then Silvie goes missing—and it's up to Ema to find her. Now she must gather the courage to hunt the city, find her friend, and uncover the secrets of the one clue Silvie left as to where she might be—inside the mysterious Midnight Guild.