Twelve-year-old Adelaide Goode, the weakest witch born to the Goode family in centuries, accidentally unleashes a curse that threatens to erase her and magic if she fails to break the spell before midnight on Halloween.
When a glowing lost and found box appears and stranger-than-normal things begin to happen at Strangeville School, it is up to Harvey and his friends to solve the mystery of a fifty-year-old curse before it is too late.