After a year of rehab from a car accident that killed her parents, Tess Barrett is ready to go back to high school for her final semester as a senior. Blinded in the accident, she hires a "seeing-eye guy" as her personal assistant. On her first day back she gets emails from someone calling himself "Dad," asking her to find and upload computer files. But the e-mailer isn't the only one who wants whatever's in those files, and suddenly people around her start dying violently. Tess wonders how much her Uncle Travis, a former assassin for a secret branch of the Army Special Forces, knows about the files. He returned from a mission in Afghanistan a year earlier to guard her father and the family from a potential threat. And since he was on watch at the time, she also begins to wonder what he knows about the accident that took both her sight and her parents' lives. In a race against time, Tess and her companion Oliver must learn the secret of the mysterious computer files before her uncle takes over her father's multi-billion-dollar software company. And before the killers stalking her get their hands on technology that could change the balance of world power.