Thirteen-year-old Lizzie Hood and her next-door neighbor Evie Verver are inseparable, best friends who swap clothes, swimwear, and field-hockey sticks and between whom-presumably-there are no secrets. The other evening, Evie disappears, and as a rabid, giddy panic spreads through the balmy suburban community, everyone transforms to Lizzie for answers. Was Evie unsatisfied, troubled, or annoyed? Had she described being implemented? Would she possess gotten in to the car of a stranger?

Compelled by curiosity, Lizzie occupies her personal furtive quest for the truth. Haunted by dreams of her dropped friend and titillated by her personal brand-new power at the center from the disappearance, Lizzie uncovers magic formula after secret and starts to question if she knew anything at all about her closest friend.