Sixteen-year-old Abigail feels nothing when her mother, who abandoned her as a baby, dies in Scotland and leaves a faded photo, a weirdly cryptic letter, and a one-way ticket to America. But the letter is surprising in that it reveals that her father is living in California and she has an eighteen-year-old sister, Becky. The two expect Abigail to move in with them, and she tries to fit in with her new American family. As Becky sweeps Abigail into a shadowy underground movement, Abigail uncovers something unimaginable: a plot aimed at controlling rebellious teens across the globe.