When 16-year-old Olive summons a spirit to answer her questions about death, she meets Jay, a hitchhiking ghost trapped in the woods behind the poorhouse where he died. In exchange for Olive’s help finding his unmarked grave, Jay agrees to come back from the other side and leave a sign of what comes next. Meanwhile, someone--or something--is targeting Olive’s classmates, and the longer Jay is around, the more serious the attacks become. Olive and her maybe-nemesis, maybe-crush Marisol must team up to free Jay’s spirit before he becomes a shade--a malevolent spirit unable to move on--and the attacks turn deadly.