Since the first secret was lost, the Narrowers have collected and stored every forgotten hope, promise, and memory in a boundless dimension known as the Narrowing Vent.

Now, in a time of great change and unease, where faith is forbidden and policed from the shadows, twelve-year-old Sadie Madison learns of the Narrowers in a fanciful bedtime story. Stirred by the tale, Sadie performs a haunting piano melody, unheard for an age. The mysterious music possesses her best friend, exposes dark family secrets, and sparks the flame of belief once more. But echoes of the melody ripple through the Narrowing Vent. Whispers gather of a child whose power can manipulate every forgotten hope, promise, and memory.

Afraid to endure alone, Sadie forges a strange companion from stardust and shadow. Can they work together to release Sadie’s best friend, untangle the Madison family history, and evade the Narrowers, before an awakening evil steals her incredible power for his own?