Imagine a vast city where airships share the sky with flying carpets, where people stroll down the streets in their pajamas, and engineers can summon rain with a single motion.
In this curious megapolis lives Holly Nightingale, an ordinary employee of the National Museum. Her familiar world falls apart the moment her younger sister Clara disappears without a trace. But the most unbelievable thing begins later: Holly discovers that Clara seems never to have existed—no one remembers her.
Now Holly will have to slip through a web of deceit, far more sweeping than she could have imagined. Who is behind the mysterious disappearances? And why do the clues lead to the very story of the city’s founding?