One afternoon after school, nine-year-old Emilie doesn't come home.After a frantic search, her father finds her backpack in a deserted alley.it is the backpack her deceased mother had given her a month before she died.Emilie would never leave that backpack behind voluntarily.A week later, a five-year-old boy goes missing.And then another.Meanwhile, Johanna Vik, a former FBI profiler with a trou...