The world is nothing like it once was: climate disasters have wracked the continent, causing food shortages, ending industry, and leaving little behind. Then came Cad, mysterious mind-altering fungi that invade the bodies of the now scattered citizenry. Reid, a young woman who carries this parasite, has been given a chance to get away -- to move to one of the last remnants of pre-disaster society -- but she can't bring herself to abandon her mother and the community that relies on her. When she's offered a coveted place on a dangerous and profitable mission, she jumps at the opportunity to set her family up for life, but how can Reid ask people to put their trust in her when she can't even trust her own mind?