It's 2034, and society is dominated by technology and almost bankrupt of direct human contact. Phoebe Bernhart is a nurse in the "neuro ward" at Grady Hospital in Atlanta when her youngest brother becomes one of the first victims of what is soon dubbed Hyper-Aggression Disorder. When Phoebe suspects a technological cause, her strange, beautiful, antisocial new acquaintance, Mila Bremer, a software engineer, agrees to help. Mila may be part of the cure... or she may be the cause... or maybe she'll prove to be indifferent to the fates of thousands of people, including Phoebe's brother.