Book Four in the Operation: Pleiades series takes place as Ally Curran, chief of research and development at ORION - a government agency with the mission of protecting the Earth, realizes that she's on the wrong side. Ally gives Mythos, a organization working against ORION and the aliens, access to ORION?S secrets and mainframe. The Mythos operative turns out to be adrenaline jockey Hunter Kent, code name Ajax. Ajax installs ORION's computers with a virus and an alarm is tripped. Then, Ally and Ajax are on the run for their lives