The Tangle, an A.I. that uses airborne nanotech to connect the earth, will connect the world in the near future. It is a benign guardian who restores law and order to society. To guarantee that The Tangle never goes rogue, a government agency monitors the technology from safe rooms, which are impervious to the nanobots that comprise The Tangle. When field agent Margot Foster is discovered dead in one of these chambers, the CIA must conduct the first murder investigation in years.