Seventeen-year-old Zoey Watson feels trapped in her small, lifeless town in Wisconsin, stuck with a distant, alcoholic father and a future that seems to lead nowhere. But everything changes when she discovers an old diary in her attic, belonging to a girl named Michelle Porter-who was murdered in 1993, her case never solved. As Zoey digs deeper into the mystery, she realizes Michelle was being stalked before her death, and the deeper she investigates, the more disturbing the truth becomes.