As the corruption of the Society intensifies and the questions surrounding her mother mount, Seraphina Parrish embarks on a journey to find Terease in the terrifying Wandering city of Nocturna. But the information she learns there only sends her team on a dangerous mission to fulfill an ancient prophecy. Delving deep into the disturbing secrets of their world, the revelations quickly unravel, revealing shocking truths about the Society and Sera's life. In the end, power and courage clash in a mission for freedom that may shatter the Wandering world completely.