When a student is found ritualistically arranged in the spooky "Sally in the Wood," local detective Ben Chase is tasked with finding the killer. His investigation quickly becomes personal when he realises his own daughter, Ellie, was at the party and is hiding something about that night. Meanwhile, Ellie's mother, Rachel, tries to support her grieving students while fearing that her daughter might be involved in the crime. As the town's urban legends come to life, the family must confront their own buried secrets and a web of digital manipulation to find the truth before another life is lost.