In this shocking new sci-fi horror series, a Russian computer virus has jumped the species barrier and wiped out most of the adult population, leaving the world precariously in the hands of the next generation. In the wake of devastation, musical prodigy Oscar Fuentes is separated from his twin sister Cira. Stranded on opposite sides of the country, they're swept into rapidly evolving networks of teenage gangs. Can Oscar find his way back to Cira . . . or will they be lost to each other forever, in a dangerous makeshift civilization that is mercilessly replacing the past?