In this loosely plotted amnesiac mystery, -tawny--skinned high school senior Allie Castillo, the nearly 18-year-old narrator, awakens sans memories after leaving a party and crashing her car into a tree. Returning to home and school in small-town British Columbia, Allie is shocked to discover that she-s been regularly in trouble with the police due to incidents of shoplifting, vandalism, and underage drinking. She also learns that she was formerly a talented aspiring actor who clashed with her single mother; regularly ditched school with her best friend, blond top student Zoe Harris; and cheated on her affectionate -golden--skinned boyfriend, school soccer captain Damien Sanchez. After Allie begins to experience vivid dreams, fragmented flashbacks, and -reality-altering hallucinations,- she teams up with -weird social pariah- and former friend Mason Byrne, who reads as white, finding clues that suggest an explanation differing from the accident-s official account. Savvy readers will intuit the guilty parties involved before the revelation, and the motives behind the mystery-s reveal remain simultaneously vague, but Allie-s stream-of-consciousness narration nevertheless pulls readers in. Ages 14-up. (Jan.)