A broken and desolate Earth. A young girl struggling to survive. A lost boy with a powerful secret. A discovery that will change everything. In the distant wake of a plague that has decimated the Earth's population, humanity is split in two: The rich and powerful live in skycities that float overhead, while those who remain on the ground have gathered in settlements strewn across a dying planet. Eighteen-year-old Terra Rhodon is a terrestrial—a denizen of the barren groundworld—who makes her living as a scav. Long abandoned by her father, her caregivers gone, Terra supports herself and her younger brother, Mica, by scouring the earth for discarded scraps and metals to recycle for profit. One day, while on a routine scavenging run, she discovers something that shocks her home settlement of Genesis X-16. When the value of her discovery is revealed, Terra's world is turned upside down. Terra suddenly finds herself asking questions no one will answer. Her search for the truth leads her to Adam—a beguiling skydweller unlike any she has ever met. But Adam has secrets and a quest of his own, and with him by her side, the world Terra thought she knew begins to unravel. Soon her discoveries unearth a terrifying conspiracy that has the potential to shatter everything—a revelation that will test the bonds of loyalty, family, and love.

First, they took her memories. Then, they took her brother. Soon, she’ll bring them down. A month has passed since Terra regained the memories that the Tribunal tried purging from her mind. Memories that contain the truth behind the divide between the ground-dwelling terrestrials and skydwellers in their floating citadels overhead. Now, she, Mica, and Adam are working hard to try and get proof of the Tribunal’s treachery. Under their ever-increasingly oppressive watch, however, continuing her ruse of feigned amnesia isn’t easy. And neither is resisting her deepening relationship with Adam—who still harbors deep secrets about his heritage. When Mica is forcibly recruited to a skyworld military academy, Terra knows it’s their way of tightening her leash. Desperate to get him back, Terra and Adam find themselves allying with the Underground—a covert resistance who have long been working to overthrow the Tribunal and right the many, many wrongs of the past. Ancient secrets will be uncovered, hidden alliances exposed, and familial ties tested in this thrilling sequel to Terra and the conclusion of the Terrestrials duology—perfect for fans of the Hunger Games and the Divergent series.