New York, 1882. A dark, forbidding city, and no place for a girl with unexplainable powers. Sixteen-year-old Avery Kohl pines for the life she had before her mother was taken. She fears the mysterious men in crow masks who locked her mother in the Tombs asylum for being able to see what others couldn't. Avery denies the signs in herself, focusing instead on her shifts at the ironworks factory and keeping her inventor father out of trouble. Other than listening to secondhand tales of adventure from her best friend, Khan, an ex-slave, and caring for her falcon, Seraphine, Avery spends her days struggling to survive. Like her mother's, Avery's powers refuse to be contained. When she causes a bizarre explosion at the factory, she has no choice but to run from her lies, straight into the darkest corners of the city. Avery must embrace her abilities and learn to wield their power--or join her mother in the cavernous horrors of the Tombs. And the Tombs has secrets of its own: strange experiments are being performed on "patients" . . . and no one knows why