Expecting a quiet Christmas with her aunt and professor uncle in western Massachusetts, artist Kate Corliss finds herself in the middle of a bitter town and campus conflict over development of a treasured green space. Then an activist colleague of her uncle’s is found dead and a wave of vandalism rocks the campus. Spurred on by the victim’s sister who claims psychic powers, Kate searches for the source of the violence as incidents pile up—a midnight prowler, poisoned mice and overwrought students. As Kate narrows in on the clues, she becomes another target and her struggle accelerates to a physical battle for her life.