"Twins Harper and Joanna Cambridge don't know Genesis: their family's FBI project with a shameful past. In fact, they don't know their family at all, only their mother, who is quiet, paranoid, and won't tell them anything. But when the twins' mother disappears one day, Harper knows that some things just aren't adding up. She quickly learns that she and her sister have been kept from the family business of espionage, and she must uncover a life's worth of secrets in order to piece together her mother's sudden vanishment. But finding her mother will come at a cost."