Five teenagers head off for a weekend at a secluded cabin in the woods. They arrive to find they are quite isolated with no means of communicating with the outside world. When the cellar door flings itself open, they of course go down to investigate. They find an odd assortment of relics and curios, but when one of the women, Dana, reads from a book, she awakens a family of deadly zombie killers. However, there's far more going on than meets the eye.

The twenty-one-year-old Timothy "Tim" Allen Russell is discharged from a mental institution by his psychiatric Dr. Shawn Graham completely healed from a childhood trauma where his father purportedly tortured and killed his mother before being killed himself by Tim. His sister Kaylie welcomes him in the parking area and brings him home. Then she tells that they need to destroy an ancient mirror that she has found through working at an auction house. She then steals the mirror and the reluctant Tim follows his sister and has fragmented recollections from their childhood, going back to when his father Alan buys a mirror for the home office of their new family home. Kaylie and Tim see a woman with their father in his office and the behaviors of Alan and Marie change, ending in a family tragedy. Kaylie blames the mirror and now she wants to destroy it with Tim. Will they succeed?

korku