It is Fall 1986 in the small town of Olympic Vista, and twelve-year-old Adelaide Winter is desperate for a distraction from her home life. When she learns of a floating jack-o'-lantern on a nearby farm, Adelaide leads her friends on a daring mission to investigate. As their plans unravel, the preteen sleuths find themselves embroiled in more danger than ever before. Can they pull together to save the day, or will this case be their last?Join Adelaide, Darius, and the rest of the gang as they embark on their latest adventure.