When 16-year-old Abigail's mother dies in Scotland--leaving a faded photo, a weirdly cryptic letter, and a one-way ticket to America--she feels nothing. Why should she? Her mother gave her away when she was a baby, leaving her to grow up on an anti-nuclear commune and then in ugly foster homes. But the letter is a surprise in more ways than one: Her father is living in California. What's more, Abigail discovers she has an eighteen-year-old sister, Becky. And the two are expecting Abigail to move in with them.
 
After struggling to overcome her natural suspicions of a note from beyond the grave (not to mention anything positive) Abigail grows close to her newfound sister. But then Becky is found dead, the accidental victim of an apparent drug overdose. As Abigail wrestles with her feelings and compiles a "Book of Remembrance" of her sister's short life, she uncovers a horrifying global plot aimed at controlling teen behavior: one that took her sister's and mother's lives, with vast implications.