CIA analyst Sera Renteria has been outed as an agent. Her family has been murdered and she has been forced to
go under ground. But even on the run, Sera cannot stand by as a cruel world preys on innocent people who have no place to turn.
As Sera investigates who betrayed her and why, she becomes an American nomad - an urban myth - coming to the aid of desperate people when they cry for help on social media using "#Guardian".