Decades of war started by a genocidal faction of aliens threatens the existence of any human or alien resisting their rule on Earth. Dani survives by scavenging enough supplies to live another day while avoiding the local military and human-hunting Wardens. But then she learns that she is part of the nearly immortal alien race of Echoes-not the human she's always thought herself to be-and suddenly nothing in her life seems certain. Following her...