Sixteen-year-old Cassidy Tomei was one of the lucky few airlifted aboard the Wonder to the planet Nyx. This emergency exodus from Earth was meant to bring new hope for the remaining survivors of humankind, but there's one problem. Humankind isn't alone on this mysterious new planet. On Nyx, Cassidy is one of many living amongst subzero temperatures and with nothing, but a meager ration of food for every household. When the rations deplete, she flees to into unfamiliar wilderness in search of food, but instead discovers debris from a foreign spacecraft that proves humankind is no longer the dominate species.