Sixteen-year-old Alison wakes up in a mental institution. As she pieces her memory back together, she realizes she's confessed to murdering Tori Beaugrand, the most perfect girl at school. But the case is a mystery. Tori's body has not been found, and Alison can't explain what happened. One minute she was fighting with Tori. The next moment Tori disintegrated--into nothing. For years Alison has tried to keep her weird sensory abilities a secret. No one ever understood--until a mysterious visiting scientist takes an interest in Alison's case.