The Pied Piper Circus lures in the lost, the lonely, people who wish to be stronger or faster or prettier…but once you join, you can never leave. Louisa knows the dangers of the traveling carnival, but she cannot afford to stay away. Not if she wants to get rid of the white owl that’s been haunting her, invading her dreams. Not if she wants to know about the dark, sinister mark in her eyes that convinces people to follow her every whim, no matter how terrible. Not when she fears what she might do with that power. Ringmaster Amos Cain has the answers Louisa seeks, but like everything else in the Pied Piper Circus, they won’t come without a price. And there’s something hungry living in the heart of the carnival that will never be satiated, no matter how many lost souls She consumes.